MAKIN’S-Air Dry Clay. This water-based PVC-free polymer clay does not need an oven to solidify. Clay dries in approximately 24 hours (varies depending on thickness of piece made). Roll, cut, shape, sculpt and texture your way to a masterpiece! It is available in a variety of colors and sizes (each sold separately). Each package contains 17.6oz/500g and instructions for use. Non-toxic/conforms to ASTM D4236. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.