 The former packaged in a hard plastic moon container, and the latter, packed in a little plastic human skull for heightened "monster" effect.The Colorforms company was the major licensee of the Plasticine brand of modeling clay in the United States from 1979 until at least 1984; Plasticine is a non-drying putty-like modeling material made from a proprietary mix chalk and vasoline.This provided Colorforms with a viable competing product against Hasbro's Play-Doh.