. . "JUVENILE NONFICTION / Technology / Machinery & Tools" . . . . . "Electronic books" . "Electronic books"@en . "Simple experiments with wheels and axles" . . . "Every time you turn on a faucet, ride a bike, or open a door, you're using a simple machine called a wheel and axle. This book uses clear text and practical, every-day examples to explain the physics behind the wheel and axle." . . "Juvenile works" . . . "Simple Experiments with Wheels and Axles"@en . . . . .