Concepts include how simple and compound machines lift things up, roll things along, turn things around, and help your own body work.

What a big idea! And what big fun: A whopping oversize book of interactive paper models to appeal to every kid who loves big machines—which pretty much covers

Toddlers love machines and things that go, and this colorful picture book by William Low gives them everything they want, from a cement mixer to a helicopter to

Get Your Move On! In Making Things Move: DIY Mechanisms for Inventors, Hobbyists, and Artists, you'll learn how to successfully build moving mechanisms through