Mungyo cozi form clay is a vegetable starch-based modeling clay that is soft and pliable, but will air-harden when you’ve perfected your sculpture. Incredibly flexible and bendable, this clay will mold well and is perfectly suitable for modeling fun and detailed sculptures. It hardens in the air in just 24 hour and won’t crack. Cozi form clay is ideal as a starter clay for children ages 3+ and is non-toxic and won't stain clothes or skin. This clay also won't crumble and can even be painted when dry!