Includes bibliographical references (page 23) and index.
Contents
Machines at the store -- What are wheels? -- Wheels doing work -- Wheels in the yard -- Different wheels -- Activity -- Glossary -- Index -- Show what you know -- Further reading -- About the author.
Summary
"The wheel and axle could be the MVP of simple machines. You couldn't ride a bike or open a door without it. Get the facts about this useful machine and make your own wheel and axle"--Back cover.
