Defines wheels and axles and shows how they are used in everyday life.

"From lightbulbs and bottle caps to water taps and peanut butter lids, screws are everywhere! Learn about screws and make your own spinning top with the help of an alien engineer"--

"Join the Maker, an alien who knows all about machines, and take a look at wedges. Readers will learn about different types of wedges and how they help make life on Earth easier"--

"A smart but silly alien companion and toy-making activity make learning about levers tons of fun! Readers can discover how levers work and the types of levers we see in our everyday lives"--

"Popular cartoon character Fred Flintstone explains how wedges work and how he uses simple machines in his daily life"--

"Presents information on simple machines with a focus on wheels and axles. Explains what wheels and axles are, how wheels and axles work, and includes examples of past and present uses. Intended for third to fifth grade students"--Provided by publisher.

Levers are discussed with information about what they are, how they work, and how they help people today.

Text and activities introduce screws and explain how screws work.

Explains how wheels work to increase forces and move objects and demonstrates how they are used in everyday life.

Text and activities introduce levers and explain how levers work.