Aurora Air Dry Sculpting Clay, 5lb, WED Pro Grade Sculpture Pro-Grade WED clay is extremely pliable sculpture clay used for modeling and molding professionally in special effects (FX) sets and the motion picture studios Water based art clay is smooth, soft, slow drying and safe for kids to play with Great hardening clay for hand building, replicas, taxidermy, clay art therapy and studio pieces Effective for casting masks with wax or clay sculpting tools Color is Gray. Not formulated to be fired.