MAKIN'S-Air Dry Clay. This water-based PVC free clay does not need an oven to solidify. It is available in a variety of colors and sizes (each sold separately. Clay dries in approximately 24 hours (varies depending on thickness of piece made). Roll; cut; shape; sculpt and texture your way to a masterpiece! Each package contains 4.2oz/120g and instructions for use. Non-toxic/conforms to ASTM D4236. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.