"Relevant images match informative text in this introduction to wheels and axles. Intended for students in kindergarten through third grade"--

Family members parade their favorite types of wheels, from one wheelbarrow to ten cartwheels.

Describes experiments involving simple machines that follow the scientific method, and can be completed in an hour or less. Explore using levers to control motion and lift, and how the steepness of inclined planes affects the force needed to move something. Most experiments also include ideas for science fair projects.

Text and pictures introduce the wheel, a simple machine used primarily to make it easy to move heavy loads.

Introduces the wheel and axle as a simple machine that can make it easier to move heavy objects, as well as to flatten dough.

"A colorful survey of Ferris wheels, including their cars and other features, descriptions of the ride experience, and a brief history. Famous Ferris wheels such as the London Eye are spotlighted"--

Describes many different kinds, uses, and benefits of wheels and axles.