Wholesale How Do Seesaws Go Up and Down? A Book About Simple Machines

Have you ever wondered how seesaws go up and down or how screws stay secure in walls? Beginning concepts of mechanical engineering including levers, wedges, inclined planes, and more are learned through diagrams, photos, and informative and engaging text. About the How Do series: These fully-illustrated nonfiction picture books are a great introduction to various STEM topics. Each title includes facts and figures, simple diagrams, and hilarious illustrations and is written in a question-and-answer format to encourage readers to ask questions and guess the answers before exploring the science behind the correct answers.