Modeling Dough by School Smart is soft, pliable, and ready to be molded into masterpieces! Young artists can finally take art into their own hands with non-staining, non-toxic model-making material. Dough is reusable if returned to its plastic tub container and air dries to a workable hardness. This Green Dough comes in a 3-1/3 pound supply (other colors available; sold separately). Non-toxic; conforms to ASTM D-4236.