Polyform Sculpey Clay Kit 1 Ounce 6/Pkg-Glow In The Dark This clay really glows! Simply shape and bake the clay, expose it to light and watch it glow! Contains four 1 oz glow-in-the-dark Sculpey, one 1 oz bar of black Sculpey, and one 1 oz bar of white Sculpey Conforms to ASTM D 4238 Made in USA