Van Aken International &ndash; Claytoon &ndash; Non-Hardening Modeling Clay &ndash; VA18153 &ndash; Neutral &ndash; Brown, White, Silver Gray, Black &ndash; 1 Pound Set (4-1/4 Pound Bars) &ndash; claymation, Gluten-Free, Non-Toxic Renowned for its smooth consistency and brilliant colors. This clay has been featured in many award winning claymation productions. Preferred by sculptors, model makers, animators, and artists' of all ages. Remains pliable, never hardens. If the Kid's forget to put their clay away, No need to worry. With this awesome clay you will never have to buy more due to it being left out for a night, a week, or even MONTHS. Fun for the whole family, when it comes to art it has no age limits. Everyone, young and old, can enjoy the therapeutic activity of creating. The only limit is your imagination. Certified by ACMI (Art and Creative Materials Institute) Safe, Non-Toxic, and Gluten-Free. Contains NO dangerous chemicals that can be harmful to children or pets.