First follow the instructions to make a mold of a simple item of your choice using the Alginate Molding Material Next mix the Perfect Cast Casting Material and pour it into the mold that you have created Manufacturered by Skullduggery. While it sets read all about what its like to be a paleontologist creating molds and plaster casts of fossils in the illustrated booklet Eyewitness Kits bring fun and learning together by utilizing vibrant imagery and unique and relevant subject matter in a hands-on toy that truly engages a child! Eyewitness Perfect Cast Casting Kits combine creativity discovery and learning in one exciting artistic journey