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Learn about machines the fun way! The Magic School Bus meets The Way Things Work in this kid-friendly guide to understanding the basics of simple machines, perfect for budding engineers. The Invention Hunters shuttle the globe in their flying museum collecting the world’s greatest inventions! Today they have landed in a construction zone. These silly scientists think they have stumbled on implausible specimens of everything you’d never find at a building site, from roller skates and pogo sticks to swords and race cars. But what they actually discover–with a kid as their guide–is how simple machines like pulleys, cranks, and levers are used to engineer tools ranging from jackhammers to dump trucks…and even toilets!The usage of simple explanations and diagrams and a heaping helping of humor, the Invention Hunters make the easiest companions for curious kids who are able to be informed about science, physics, engineering, history, and more.