Dump Trucks

Beginning readers will explore how hammers pound in and pull out nails. A back matter spread explains how hammers are one kind of simple machine: a lever.

Kids will find out how wrenches tighten bolts in many types of situations. A back matter spread explains how a wrench is another type of lever.

Students will see how levels indicate whether objects are flat or straight. A back matter spread explains why people use levels.

Learners will understand how saws have sharp teeth that cut through wood. A back matter spread explains how saws are a kind of simple machine: a wedge.

Have you ever wondered how seesaws go up and down or how screws stay secure in walls? Beginning concepts of mechanical engineering, including levers, wedges, inclined planes, and more, are explored in this newest engaging addition to the How Do seri...

Young readers will learn how pliers grip and hold objects in their jaws. A back matter spread explains how pliers also work as levers.

What is a robot? Discover the history and science behind these amazing machines as well as meet the coolest robots of today and tomorrow in this inviting and entertaining photo-packed book.

Curious readers will discover how screwdrivers tighten screws using different kinds of tips. A back matter spread explains how screws are simple machines used to fasten objects together.

Can something small matter at all? Of course it can! In this book for young readers (who know a thing or two about being small), you can take a super close look at details too little to be seen with the human eye. Powerful shots from scanning electr...