Prang DAS Air Hardening Clay is an excellent modeling clay for all art projects. This clay hardens in 24 hours. It is super pliable yet allows you to produce a permanent work of art. Allows ample open time to complete projects before hardening. Available in White or Terracotta. (Air Hardening - Doesn't require oven baking. Air dries in 24 hours). Made in Italy since 1963.