Dive into the prehistoric world with Tyrannosaurus rex, Plateosaurus, Stegosaurus, and more of the coolest dinosaurs that ever lived Smithsonian: My First Book of Dinosaurs features thirty different dinosaurs and includes fascinating facts about when they lived, what they ate, and much more The simple text and accompanying striking images of dinosaurs in action, along with tabs perfectly sized for little hands, will delight preschoolers for hours