Snowflake Building Blocks: Key Features, Composition, and How It Supports Industrial Projects

Types of Snowflake Building Blocks

A snowflake building block is more than just a toy—it's a gateway to creativity, learning, and developmental growth for children. These uniquely designed interlocking toys allow kids to build intricate snowflake patterns and three-dimensional structures, stimulating their imagination while enhancing fine motor skills, spatial awareness, and cognitive development. Available in various materials and designs, snowflake building blocks cater to different age groups, educational goals, and environmental values.

Plastic Building Blocks

Brightly colored and easy to connect, plastic snowflake blocks are ideal for younger children. Their simple interlocking mechanism promotes hand-eye coordination and early learning concepts.

Advantages

• Vibrant colors enhance color recognition
• Durable and easy to clean
• Promotes cooperative play and sharing
• Supports early math skills like counting and sorting

Limitations

• Made from petroleum-based plastics (less eco-friendly)
• Can be noisy during play
• May warp under high heat

Best for: Toddlers and preschoolers, classroom group activities, sensory play

Magnetic Snowflake Blocks

Equipped with embedded magnets, these blocks snap together effortlessly, making construction intuitive and engaging. They encourage exploration of symmetry, geometry, and magnetic forces.

Advantages

• Easy to assemble and disassemble
• Encourages experimentation with shapes and balance
• Introduces basic science concepts (magnetism)
• Quiet and smooth building experience

Limitations

• Higher cost due to magnetic components
• Not suitable for children under 3 (choking hazard)
• Magnets may weaken over time

Best for: Ages 4–10, STEM learning, creative builders

3D Puzzle Snowflakes

These structured kits guide children through step-by-step assembly to create detailed 3D snowflake models. Often themed or seasonal, they combine art and engineering.

Advantages

• Improves focus and attention to detail
• Builds problem-solving and logical thinking
• Provides a sense of accomplishment upon completion
• Great for display or holiday decoration

Limitations

• Less open-ended creativity
• Requires following instructions closely
• May frustrate younger or impatient children

Best for: Older children (8+), quiet time activities, holiday-themed learning

Biodegradable Snowflake Blocks

Made from plant-based materials like cornstarch or bamboo composites, these eco-conscious blocks offer a sustainable alternative to traditional plastic toys.

Advantages

• Environmentally friendly and compostable
• Reduces plastic waste and carbon footprint
• Teaches children about sustainability
• Safe, non-toxic materials

Limitations

• Less durable in wet conditions
• Limited availability and higher price
• Fewer color options compared to plastic

Best for: Eco-conscious families, outdoor classrooms, environmental education

Educational Snowflake Blocks

Designed with learning in mind, these blocks integrate STEM/STEAM concepts—such as symmetry, molecular structures, or crystal formation—into hands-on play.

Advantages

• Teaches science, math, and engineering principles
• Encourages inquiry-based and experiential learning
• Aligns with school curricula and educational standards
• Can be used in both home and classroom settings

Limitations

• May be too advanced for younger children
• Requires adult guidance for full educational benefit
• Typically more expensive than standard toys

Best for: Homeschooling, STEM classrooms, science fairs, gifted learners

Type	Age Range	Educational Value	Eco-Friendliness	Best Use Case
Plastic Building Blocks	2–6 years	High (colors, counting, motor skills)	Low	Early childhood development, daycare centers
Magnetic Snowflake Blocks	4–10 years	Very High (STEM, shapes, balance)	Medium	Interactive play, science exploration
3D Puzzle Snowflakes	8+ years	High (problem-solving, focus)	Medium	Holiday activities, fine motor challenges
Biodegradable Blocks	3–12 years	Medium (eco-awareness)	Very High	Green schools, sustainable parenting
Educational Snowflake Blocks	6–14 years	Exceptional (STEM concepts)	Variable	Classroom instruction, advanced learners

Expert Tip: Combine different types of snowflake blocks for enriched learning—use magnetic or plastic blocks for free-form creation, and introduce 3D puzzles or educational sets to challenge older children and deepen their understanding of geometry and environmental science.

How to Choose Snowflake Building Blocks for Children

Snowflake building blocks are a fun and educational toy that encourages creativity, fine motor development, and cognitive growth in children. Choosing the right set involves more than just picking a colorful box off the shelf—it requires understanding your child's developmental stage, safety needs, and play preferences. This guide covers the essential factors to consider when selecting the perfect snowflake building blocks for your little one.

1. Consider the Child's Age and Developmental Stage

Age-appropriate design is crucial for both safety and engagement. Building blocks are typically categorized by age groups to match developmental milestones.

Ages 1–3 Years (Toddlers)

Blocks for toddlers are large, soft, and easy to grasp. They are designed to prevent choking hazards and reduce the risk of injury if dropped. Bright colors and high contrast patterns stimulate visual development and help children learn to identify colors and basic shapes like circles, squares, and animals.

These sets often feature chunky, interlocking pieces that are simple to connect and pull apart, supporting hand-eye coordination and early problem-solving skills. The focus is on sensory exploration and basic stacking rather than complex construction.

Ages 3–5 Years (Preschoolers)

As children grow, their dexterity and cognitive abilities improve. Blocks for this age group are smaller and more intricate, allowing for detailed creations such as houses, cars, or animals. Some sets include puzzle-like elements where pieces must fit together in a specific way, promoting logical thinking and spatial awareness.

These blocks often come with themed sets—like farms, castles, or vehicles—that encourage imaginative storytelling and role-playing, further enhancing language and social skills.

2. Evaluate the Material Quality and Safety

The material of the building blocks directly impacts safety, durability, and sensory experience.

Soft Plastic, Rubber, or Foam

Ideal for infants and toddlers, these materials are lightweight, flexible, and safe if dropped or chewed. Soft plastic blocks are often BPA-free and non-toxic, meeting strict safety standards. Their bright, glossy finish attracts attention and supports visual tracking.

Foam or rubber blocks are excellent for active play and can be used in sensory bins or bath time, adding versatility to play routines.

Wooden Blocks

Best suited for older children, wooden blocks are durable, eco-friendly, and offer a natural tactile experience. They are typically finished with non-toxic paints or sealants and are less likely to break over time.

While not recommended for very young children due to their weight and hardness, wooden snowflake-style blocks can be a long-term investment for creative building and open-ended play.

3. Assess Block Size and Safety Standards

Size plays a critical role in both usability and safety.

Large Blocks (1.5+ inches): Perfect for young children who are still developing fine motor skills. These are too large to swallow, reducing choking risks. They are easy to grip and manipulate, supporting early hand strength and coordination.

Smaller Blocks (under 1 inch): Suitable for children aged 3 and up with better finger control. These allow for more detailed and complex builds, fostering creativity and concentration. Always supervise younger children during play to prevent accidental ingestion.

Smooth Edges and Non-Toxic Finishes: Ensure all blocks have rounded corners and are certified safe by recognized standards (e.g., ASTM F963, EN71).

4. Look for Variety in Shapes, Sizes, and Themes

A diverse set enhances play value and developmental benefits.

Opt for building block sets that include a wide range of shapes—such as triangles, arches, curves, and connectors—along with specialty pieces like wheels, doors, or windows. This variety allows children to build everything from simple towers to elaborate structures like bridges, vehicles, or fantasy castles.

Themed sets (e.g., winter wonderland, arctic adventure, or holiday snowflakes) can spark imaginative play and storytelling. Sets with 50+ pieces provide ample opportunities for extended, engaging play sessions that grow with the child’s skill level.

5. Check Customer Reviews and Brand Reputation

Real-world feedback is invaluable when evaluating quality and durability.

Look for consistently positive reviews that highlight:

Safety: Confirmation that materials are non-toxic and meet safety regulations.

Durability: Blocks that withstand repeated use without cracking, fading, or breaking.

Child Engagement: Reports that children enjoy playing with the set for extended periods and return to it regularly.

Ease of Assembly: Feedback on whether pieces connect smoothly and stay together during play.

Avoid sets with recurring complaints about poor quality, missing pieces, or difficulty in connecting blocks, as these can frustrate young builders and shorten the toy’s lifespan.

Selection Factor	Best For	Key Tips
Age Appropriateness	1–5 years	Choose large, soft blocks for toddlers; smaller, detailed sets for preschoolers
Material Type	Safety & durability	Soft plastic/foam for babies; wood or hard plastic for older kids
Block Size	Choking hazard prevention	Ensure blocks are larger than 1.25" for children under 3
Set Variety	Creativity & engagement	Select sets with 50+ pieces and diverse shapes/themes
User Reviews	Quality assurance	Prioritize brands with consistent 4.5+ star ratings and safety certifications

Important: Always supervise young children during play, especially with smaller blocks. Check for recalls or safety notices from consumer protection agencies. Store blocks in a secure, labeled container to prevent loss and ensure easy cleanup. Proper selection and supervision ensure a safe, enjoyable, and enriching play experience that supports your child’s growth and imagination.

Functions, Features, and Design of Snowflake Building Blocks

Snowflake building blocks are more than just a toy—they are a dynamic educational tool designed to inspire creativity, enhance cognitive development, and introduce children to fundamental scientific and mathematical concepts through hands-on play. These innovative toys blend the beauty of natural snowflakes with the versatility of construction play, offering a unique experience that supports both entertainment and learning.

Educational Insight: Each snowflake block mimics the hexagonal symmetry found in real snowflakes, providing a tangible way for children to explore crystallography, molecular structures, and fractal patterns in nature.

Core Functions & Educational Benefits

Snowflake building blocks serve multiple developmental purposes, making them ideal for early childhood education and STEM learning environments.

• Creative Development: Encourages open-ended play, allowing children to design infinite configurations—from abstract sculptures to realistic snowflake replicas.
• STEM Learning: Introduces principles of symmetry, geometry (hexagons, angles, and tessellation), and spatial reasoning in an intuitive, visual format.
• Fine Motor Skills: Snapping pieces together strengthens hand-eye coordination and dexterity, essential for writing and other daily tasks.
• Cognitive Growth: Promotes problem-solving, pattern recognition, and logical thinking as children plan and execute their builds.
• Scientific Curiosity: Sparks interest in meteorology and physics by simulating the formation of ice crystals and the uniqueness of each snowflake.

Key Design Elements

The design of snowflake building blocks is intentionally aligned with both aesthetic appeal and functional learning objectives.

• Hexagonal Base Structure: Reflects the natural six-fold symmetry of real snowflakes, reinforcing scientific accuracy in play.
• Modular Connectivity: Pieces feature multiple connection points (typically 6 per block), enabling radial, linear, and 3D constructions.
• Scalable Complexity: Simple enough for toddlers to connect, yet complex enough for older children to create intricate geometric mosaics or molecular models.
• Transparent & Opaque Options: Some sets include see-through pieces to simulate ice, enhancing realism and light-play opportunities.
• Ergonomic Sizing: Designed to be easy to grasp and manipulate, even for small hands, without sharp edges.

Essential Features of Snowflake Building Blocks

Manufacturers incorporate specific features to ensure safety, durability, and educational value. These characteristics make snowflake blocks a trusted choice for parents, educators, and therapists.

Interlocking Mechanism

The interlocking design is central to the functionality of snowflake blocks. Made from flexible yet sturdy plastics like ABS or BPA-free polymers, the connectors allow for repeated assembly and disassembly without wear.

• Snug-fit joints prevent accidental detachment during play
• Multi-directional connectors support 2D patterns and 3D structures
• Encourages experimentation with balance, stability, and structural engineering

Pro Tip: Look for sets with audible "click" feedback to help younger children confirm successful connections.

Variety of Shapes and Sizes

Blocks come in multiple variants—central hubs, arms, connectors, and full snowflake units—enabling layered complexity.

• Small, medium, and large snowflake templates allow scaling of designs
• Specialty pieces (e.g., glow-in-the-dark, magnetic, or textured) add sensory engagement
• Compatibility across sets enables expansion and collaborative building

Creative Bonus: Mixing sizes helps teach proportion and scale, turning play into a lesson in measurement and comparison.

Vibrant & Educational Color Schemes

Colors are not just decorative—they serve cognitive and emotional learning purposes.

• Bright, contrasting hues improve visual tracking and color identification
• Color-coded pieces can be used to teach sorting, patterning (ABAB, AABB), and sequencing
• Iridescent or gradient finishes mimic the shimmer of real snow and ice
• Some sets use color to represent temperature zones or molecular types in educational kits

Learning Link: Use color-based challenges (e.g., "Build a symmetrical snowflake using only warm colors") to combine art and science.

Durability and Safety

Designed for heavy use in homes, classrooms, and therapy settings, these blocks meet rigorous safety standards.

• Made from non-toxic, phthalate-free, and lead-free materials compliant with ASTM F963 and EN71 standards
• Impact-resistant construction withstands drops, stomping, and rough play
• Smooth edges and seamless surfaces prevent skin irritation or snagging
• UV-stable pigments resist fading even after prolonged light exposure

Parent Assurance: Look for sets with a minimum 3-year durability guarantee and dishwasher-safe cleaning options.

Hygiene & Maintenance

Easy cleaning is essential for toys shared among children or used in educational environments.

• Smooth, non-porous surfaces resist dirt and bacterial buildup
• Can be sanitized with mild soap, wipes, or in a dishwasher (top rack)
• Quick-drying material prevents mold or mildew in humid conditions
• Storage trays or mesh bags included in premium sets for organization and cleanliness

Classroom Tip: Rotate sets weekly and sanitize between uses to maintain hygiene in group settings.

Age & Skill Adaptability

Snowflake blocks are scalable across age groups, making them versatile for diverse learning stages.

• Ages 3–5: Focus on color matching, simple symmetry, and fine motor practice
• Ages 6–8: Introduce geometric terms, pattern creation, and collaborative builds
• Ages 9–12: Explore advanced symmetry, fractals, and 3D modeling
• Special Needs: Used in occupational therapy to improve tactile processing and focus

Inclusive Design: Tactile markers or high-contrast colors support children with visual or developmental differences.

Feature	Educational Benefit	Recommended Age	Ideal Use Case
Interlocking Hexagonal Pieces	Spatial reasoning, symmetry understanding	3+	STEM centers, home play
Multi-Color Sets	Color recognition, pattern creation	2–6	Early learning classrooms
Glow-in-the-Dark or Light-Transmitting	Sensory stimulation, light science	4+	Sensory rooms, bedtime play
Magnetic Connectors	Introduction to physics concepts	5+	Science labs, interactive exhibits
Labeled Geometry Sets	Math integration, vocabulary building	7–12	Middle school math instruction

Why Snowflake Building Blocks Stand Out

• Nature-Inspired Learning: Bridges the gap between imaginative play and real-world science, fostering environmental awareness.
• Endless Reusability: Unlike single-use crafts, these blocks can be rebuilt into new designs daily, promoting sustainable play.
• Collaborative Potential: Encourages teamwork when children build large installations together.
• Cross-Curricular Use: Applicable in art (design), math (geometry), science (crystal formation), and language (describing structures).
• Quiet Play Option: Ideal for indoor, low-noise activities during travel, waiting rooms, or quiet hours.

Expert Recommendation: For maximum educational impact, pair snowflake building blocks with guided activities—such as "Symmetry Challenges" or "Build-a-Blizzard" storytelling sessions. This transforms free play into structured learning while maintaining fun. Consider themed kits (e.g., winter ecosystem, space ice crystals) to extend engagement across subjects.

Safety and Quality of Snowflake Building Blocks

Snowflake building blocks are a popular choice for children’s construction toys, combining imaginative play with developmental benefits. Designed with both safety and quality in mind, these blocks are ideal for young learners and builders. This guide explores the key safety standards and quality features that make Snowflake building blocks a trusted option for parents, educators, and children.

Safety First: Always supervise young children during play, especially those under 3 years old. While Snowflake blocks are designed to be safe, proper adult oversight ensures a secure and enriching play experience.

Safety Features of Snowflake Building Blocks

Manufacturers prioritize child safety through thoughtful design and material selection. The following safety features make Snowflake building blocks suitable for toddlers and preschoolers:

• Non-Toxic Materials

  All Snowflake blocks are crafted from high-grade, non-toxic plastics that are rigorously tested to meet international safety standards. They are BPA-free, phthalate-free, and comply with ASTM F963 and EN71 toy safety regulations. This ensures that even if a child mouths or chews on a block, there is no risk of chemical exposure.

• Smooth Edges and Rounded Corners

  Each block is precision-molded with smooth surfaces and fully rounded edges to eliminate sharp points. This design prevents skin irritation, cuts, or scratches during extended play, making them safe for sensitive hands and active building sessions.

• Choking Hazard Prevention

  Snowflake blocks are intentionally sized larger than the standard small parts threshold (typically over 1.25 inches in diameter), significantly reducing the risk of choking. This makes them appropriate for children aged 18 months and up, aligning with U.S. Consumer Product Safety Commission (CPSC) guidelines.

• High Durability and Structural Integrity

  Made from impact-resistant materials, these blocks resist cracking, snapping, or splintering under normal play conditions. Their robust construction prevents the formation of sharp fragments, even after repeated use, drops, or stepping on them.

• Hygienic and Easy to Clean

  The non-porous surface of Snowflake blocks resists dirt, germs, and stains. Most sets can be safely cleaned with mild soap and water or wiped down with disinfectant wipes. Some premium lines include antimicrobial additives to further inhibit bacterial growth, making them ideal for daycare centers and shared environments.

Pro Tip: Store blocks in a labeled, ventilated bin to keep them organized and dust-free. Regular cleaning (weekly or after illness) helps maintain hygiene and prolongs the life of the set.

Quality Features That Enhance Play and Learning

Beyond safety, Snowflake building blocks are engineered for long-term durability, educational value, and creative engagement. Their quality design supports cognitive, motor, and social development in children.

• Premium Material Quality

  Constructed from high-density polyethylene (HDPE) or ABS plastic, Snowflake blocks maintain their shape, color, and strength over time. They resist fading from sunlight, warping from temperature changes, and wear from frequent handling, ensuring years of reliable use.

• Ease of Assembly and Disassembly

  The blocks feature an intuitive interlocking mechanism that requires minimal force to connect and disconnect. This is especially beneficial for children developing fine motor skills and hand-eye coordination, allowing them to build confidently without frustration.

• Exceptional Versatility

  With a wide variety of shapes—such as triangles, hexagons, rods, and connectors—Snowflake blocks support limitless building possibilities. Children can create animals, vehicles, structures, or abstract art, promoting open-ended play, problem-solving, and spatial reasoning.

• Cross-Brand Compatibility

  Snowflake blocks are designed to be compatible with major building block systems, allowing children to integrate pieces from other brands. This expands creative potential and lets families combine collections for larger, more complex builds.

• Visually Engaging Design

  Available in vibrant, UV-stable colors, the blocks capture children’s attention and stimulate visual learning. Many sets include idea booklets or QR codes linking to digital building guides, offering step-by-step inspiration and challenges to boost engagement and confidence.

Feature Category	Key Benefits	Safety & Quality Standards	Ideal For
Material Safety	Non-toxic, BPA-free, no harmful chemicals	ASTM F963, EN71, CPSIA compliant	Infants, toddlers, schools
Physical Design	Smooth edges, no sharp parts, large size	CPSC small parts tested	Children 18+ months
Durability	Impact-resistant, long-lasting, colorfast	Stress-tested for repeated use	Heavy play, classrooms
Play Value	Encourages creativity, STEM learning, motor skills	Educationally endorsed	Homes, therapy, preschools
Cleanability	Washable, stain-resistant, hygienic	Suitable for shared environments	Daycares, hospitals, travel

Expert Insight: To maximize developmental benefits, engage with your child during building time. Ask open-ended questions like “What are you building?” or “How does this part connect?” to enhance language, reasoning, and collaborative skills.

Final Recommendations

• Always check age recommendations and safety labels before purchase.
• Inspect blocks periodically for signs of wear, cracks, or loose parts.
• Choose sets with storage solutions to prevent loss and encourage cleanup habits.
• Opt for larger sets with diverse shapes to support evolving skill levels.
• Consider educational bundles that include activity cards or curriculum guides for structured learning.

Snowflake building blocks offer a perfect blend of safety, durability, and creative potential. Whether used at home, in classrooms, or therapeutic settings, they provide a secure and enriching platform for children to explore, build, and grow. By choosing high-quality, safety-tested blocks, parents and educators invest in both fun and foundational development.

Frequently Asked Questions About Snowflake Building Blocks

Q1: What Are the Educational and Developmental Benefits of Snowflake Building Blocks?

Snowflake building blocks are more than just toys—they are powerful tools for child development. Designed with interlocking pieces that resemble snowflakes, these blocks offer a wide range of cognitive, physical, and social benefits for children of various ages.

• Fine Motor Skill Development: As children grasp, twist, and connect the blocks, they strengthen the small muscles in their hands and fingers. This improves dexterity and prepares them for tasks like writing, buttoning clothes, and using utensils.
• Gross Motor Skill Enhancement: Larger constructions encourage reaching, stretching, and moving around, which supports the development of coordination and balance.
• Hand-Eye Coordination: Aligning and snapping pieces together requires visual focus and precise hand movements, helping children refine their spatial awareness and motor control.
• Cognitive Growth: Building with snowflake blocks fosters problem-solving, pattern recognition, and early math skills such as symmetry, counting, and sequencing.
• Social and Emotional Learning: When used in group play, these blocks promote teamwork, communication, and sharing. Children learn to negotiate ideas, collaborate on designs, and resolve conflicts constructively.
• Creativity and Imagination: Open-ended play allows kids to design anything from simple shapes to complex structures, encouraging creative thinking and storytelling.

Whether used at home or in educational settings, snowflake building blocks provide a fun and engaging way to support holistic child development.

Q2: How Should I Clean and Maintain Snowflake Building Blocks?

Regular cleaning of snowflake building blocks is essential to ensure hygiene, longevity, and safe play—especially since they are frequently handled by young children. Dirt, dust, and food residue can accumulate over time, so proper care helps maintain both appearance and structural integrity.

Step-by-Step Cleaning Guide:

1. Prepare a Cleaning Solution: Fill a basin with warm (not hot) water and add a small amount of mild, non-toxic dish soap. Avoid harsh chemicals or bleach, which can degrade plastic over time.
2. Wipe Down Each Block: Use a soft cloth or sponge to gently clean the surface of each piece. Pay attention to connection points where dirt may collect.
3. Clean Hard-to-Reach Areas: For crevices or tight spaces, use a soft-bristled toothbrush to scrub gently without scratching the surface.
4. Rinse Thoroughly: After washing, rinse each block under clean running water to remove all soap residue, which can be irritating if left behind.
5. Air Dry Completely: Lay the blocks out on a clean towel in a well-ventilated area, away from direct sunlight to prevent warping. Ensure they are fully dry before storing to avoid mold or mildew.

Tips for Long-Term Care:

• Store blocks in a dry, cool place inside a labeled bin or storage bag to prevent loss and contamination.
• Clean blocks every 2–4 weeks with regular use, or immediately after exposure to food, sand, or outdoor environments.
• Inspect periodically for cracks, sharp edges, or broken pieces, and remove damaged blocks to ensure safety.

With consistent maintenance, snowflake building blocks can remain vibrant, safe, and functional for years—ideal for repeated play and even hand-me-downs.

Q3: What Materials Are Snowflake Building Blocks Made Of, and What Accessories Are Available?

Snowflake building blocks are typically crafted from high-quality, child-safe plastics designed for durability and repeated use. Understanding the materials and available accessories helps parents and educators make informed choices about safety, sustainability, and play value.

Common Materials Used:

• ABS Plastic (Acrylonitrile Butadiene Styrene): A strong, impact-resistant thermoplastic commonly used in premium building toys. It is non-toxic, BPA-free, and capable of holding bright colors without fading.
• PP (Polypropylene): Often used for softer or flexible components, this material is also food-safe and highly durable.
• Compliance Standards: Reputable brands ensure their products meet international safety regulations such as ASTM F963 (U.S.), EN71 (Europe), and ISO 8124, guaranteeing they are free from harmful substances like lead, phthalates, and cadmium.

Eco-Friendly Options: Some manufacturers now offer building blocks made from recycled plastics or bioplastics derived from renewable resources, appealing to environmentally conscious consumers.

Available Accessories to Enhance Play:

To expand creative possibilities and keep children engaged, many snowflake block sets include or are compatible with a variety of accessories:

• Miniature Figurines: People, animals, or fantasy characters that bring stories to life during imaginative play.
• Vehicles and Transport Pieces: Cars, planes, or trains that can be attached to structures or used independently.
• Themed Expansion Kits: Space stations, castles, or farms that allow kids to build immersive worlds.
• Wheels, Axles, and Hinges: Functional parts that enable moving creations like rolling cars or opening doors.
• Storage and Organization Tools: Carrying cases, sorting trays, or labeled bins to help manage larger collections.

These additions not only increase play value but also support narrative development, role-playing, and extended engagement. Whether used solo or in group settings, snowflake building blocks with accessories offer endless opportunities for learning through play.