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.