1.Air Hardening: Hand Imprint clay is air dry clay, it hardens and cures at normal room temperature. 2.Non-toxic: Hand Imprint clay is made of a combinations of calcium carbonate, natural fiber, glue, water and oil. It is non-toxic and suitable for kids. 3.Great DIY souvenir: Hand Imprint clay can capture baby’s handprint, to remind you of their newborn days. It is a great souvenir for novice parents.