- Perfect gift for birthdays, holidays, and curious toddlers! Collect all the books in the Peek-a-Flap series. " Explore the fascinating prehistoric world of dinosaurs that roamed the Earth more than 65 million years ago in this interactive Peek-a-Flap! Curious little readers will travel through multiple dino-themed scenes including museum exhibits, Jurassic period natural habitats, and active dinosaur dig sites. Learn all about the triceratops, stegosaurus, velociraptor, brachiosaurus, t.rex, and prehistoric marine reptiles that ruled the sea with fun surprises and facts that pop up under every sturdy lift-a-flap. This lively, educational dinosaur book is a must-have for little dino enthusiasts Collect the entire Peek-a-Flap board book series!