Crayola Air Dry Clay dries to form a hard solid so there s never a need for baking or firing it. This easy to work with modeling clay is already finer and softer than most other clays and you can soften it further with water as needed. It s also great for painting when fully dry no matter if you prefer watercolor acrylics or tempera paints. This 2.5 lb. box is ideal for group crafts art projects and more.