People like to play! From speeding down roller coasters to riding bikes, we like to be on the go. Forces, energy, and motion are all a part of how we play. In this book, young readers will learn how engineers use science to create fun and safe rides, games, sports equipment, and more! The Mi Biblioteca de Ingenieria/My Engineering Library series gives an introduction to a variety of engineering and design topics for beginning readers based on NGSS. From learning about how engineers design rockets to how they build structures underwater, these informative books present complicated information in easy-to-understand language with kid-friendly examples and diagrams. Each book includes a glossary, index, and an engineering design activity to support further comprehension.