Using a firm, gelatin-like compound, this toy provides the realistic experience of scientific dissection without harming a real snake. The rattlesnake is the biggest kit in the Dissect-It line as it comes with 35 bones and organs to dissect along with a special surprise. Each kit also comes with a detailed, full-color learning guide, a work table, four safe surgical tools, and two refill mixes so kids can dissect it again and again!