Hello Chemistry. Let's make something beautiful! Our Coral Reef kit creates a colorful variety of coral. This kit includes three paper coral forms, three trays, three packets of terraforming powders, and instructions. Coral reefs are diverse underwater ecosystems. (An ecosystem is a community of living things that interact and depend on one another.) They are second only to the rainforest for their biodiversity. Coral reefs contain 25% of the world’s fish species and protect coastlines from storms. It's like snorkeling at your desk! A great reef in a 4x4x5.5 tube.