Fossils are the key to unlocking the mysteries of prehistoric life. With this kit, kids can learn about many species of dinosaurs and pterosaurs, some of the most prolific and impressive creatures to ever exist on Earth. The 32-page book guides kids through various activities: assembling a dinosaur skeleton, building a pterosaur mobile, casting plaster fossils, playing a dinosaur quiz game, creating a time spiral and making a geological-time bookmark.