Crayola Air-Dry Clay is a fine, natural white earth clay that air dries to a hard solid. No kiln or oven necessary! Easy to use with traditional modeling techniques, it's also a snap to clean up. Air-Dry Clay is smoother, finer and less sticky than traditional clay. Each pack includes 2.5 lbs. of clay. Sold as 4 packs for a total of 10 lbs. of clay.