Ideal for today's young investigative reader, each A True Book includes lively sidebars, a glossary and index, plus a comprehensive "To Find Out More" section listing books, organizations, and Internet sites. A staple of library collections since the 1950s, the new A True Book series is the definitive nonfiction series for elementary school readers.

"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This book also opens eyes and minds to the diversity of machines in their lives, and sparks the imagination with challenge, humor, and achievable projects"--Publisher.

Introduces six simple machines, describing how they work in more complex machinery and how they are used every day.

Night 1 / My life is perfect. / I have a bowl full of seeds, a cozy pile of wood shavings, and room to run. / I'm never leaving here. / Question: Who's the luckiest hamster in the world? / Answer: ME! Seymour the hamster has the perfect life. He has a spacious cage, a constant food supply, and a FuzzyBoy 360 exercise wheel that lets him run to his heart's content. Life could not be better. Or could it? When Pearl the cat tells Seymour of the goodies beyond the safe confines of his cage, he starts to think he's missing out. And out is the new in! It's only after Seymour is out of his cage that he begins to fully appreciate his safe and cozy home.

"Uses popular cartoon character Wile E. Coyote to demonstrate science concepts involved with simple machines"--Provided by publisher."--

For use in schools and libraries only. Includes an assortment of activities using such simple machines as pulleys and levers.

Why is a spring like a simple machine? What forces do you need for a spring to change shape? How do springs store energy? Look at everything from historical examples of springs, such as a ballista, to the role of levers in complex machines, such as racing cars.