What do the rollere coaster's machines work?
gives kids an amazing behind-the-scenes look at more than 300 of the world's most marvelous machines, including insanely fast drag racers, superliners like the Queen Elizabeth 2, the International Space Station, and gigantic diggers. Inside, engaging text, awesome graphics, and hundreds of dynamic photographs illustrate how these machines work and what jobs they do. Plus, large foldout diagrams…