LEGO TECHNIC is designed to allow builders to create more advanced models with moving parts, like those built with LEGO MINDSTORMS. The Unofficial LEGO TECHNIC Idea Book: Walkers offers hundreds of ideas for combining LEGO TECHNIC propellers, motors, weights, magnets, and other parts to make creations that walk. The book is color throughout, with little to no text accompanying its diagrams; rather than tell you what to think, you are encouraged to use your own imagination. Walkers begins with basic four-legged walkers, including an ant, a spider, and a dog. It then shows how to do more complex things with LEGO TECHNIC, like how to use propellers, wind, weights, and vibration to make creations move; utilize springs to make a rocket launcher and a tennis ball pitching machine; employ pumps, cylinders, and the air to make creations move; and more. The Unofficial LEGO TECHNIC Idea Books are for anyone who wants to create a moving masterpiece, as well as those who want to make original robots with MINDSTORMS.