Make your own astronomy-themed stepping stone. Just add water to the cement and pour into the mold. Then decorate with blue glass bits and yellow stars. Kit includes a reusable 8" round mold, 3-1/2 lb. bag of cement, 4 oz. of blue glass pieces, 10 yellow stars, craft stick for writing, 12 patterns and instructions. For ages 8 and up. Conforms to ASTM D4236.