POLYFORM-Sculpey III Oven Bake Polymer Clay. Americas original oven-bake clay! Sculpey III is soft and pliable and will not dry out when exposed to air. Perfect for making all kinds of crafts from free-form jewellery pieces to scrapbook embellishments. Just shape, bake, and cool. This package contains twelve 1 ounce bars of Sculpey III oven-bake clay. Available in a variety of packs: each sold separately. Recommended for ages 8 and up. Conforms to ASTM D4236. Made in USA.