I Know Things That Go invites kids to discover the big and fascinating world of vehicles - over 50 different kinds of machines ! Kids will love lifting the flaps and learning how various vehicles work and what they do. The book has 40 sturdy flaps to lift featuring colorful kid-friendly illustrations that introduce new concepts and vocabulary in a simple way. Clever Questions is an innovative non-fiction series that includes 4 titles about the most popular subjects; vehicles; weather and climate; sports and the world around us. The handy square size and the high quality board pages with round corners make this series a perfect way to discover the world and how it works.