Includes bibliographic references (p. 24) and index.
What is a wheel and axle? -- The parts of a wheel and axle -- The wonders of the wheel -- The wheel and axle at work -- The first wheel and axle -- Wheels and axles through time -- Let's travel by wheel and axle! -- Wheels, axles, and you -- An experiment with wheels and axles -- Wheels and axles that go super fast.
Introduces wheels and axles, including how they function together to create simple machines and how they are used in everyday objects to make life easier.