This award winning kit is one of our favorites! With this kit students can cast their own fossil replicas. It comes with six high-quality, reusable seamless rubber molds (ammonite, crinoid, trilobite, cave bear tooth, shark tooth, and raptor claw), four pounds of PerfectCast casting medium, extensive background information on each fossil and suggested exercises for students. This kit won the Learning Magazine Teachers' Choice Award for outstanding educational kit... and we agree! Note that the molds included with this kit are different than our individual molds in that they are single-sided with a flat bottom for easy display and painting. Introduce the Earth's history in a thrilling fashion with authentic fossil replicas your students can actually take home! Approx. 3-5 inches long each.