"Simple text and full color photographs introduce young readers to police cars. Intended for students in kindergarten through third grade"--Provided by publisher.

"Simple text and full color photographs introduce young readers to big rigs. Intended for students in kindergarten through third grade"--Provided by publisher.

"Simple text and full color photographs introduce young readers to taxis. Intended for students in kindergarten through third grade"--Provided by publisher.

"Introductory text explains the functions and physical concepts of the circulatory system with color photography and simple scientific diagrams. Intended for students in grades three through six"--Provided by publisher.

"Introductory text explains the functions and physical concepts of the skeletal system with color photography and simple scientific diagrams. Intended for students in grades three through six"--Provided by publisher.

"Simple text and full color photographs introduce young readers to tow trucks. Intended for students in kindergarten through third grade"--Provided by publisher.

Screws are simple machines used for many different jobs. The concept of a screw is used in snow blowers, drills, and presses. Kids will learn how screws work and how they are used in complex machines.

People get energy from food and use energy to exercise. This book teaches young readers about chemical and kinetic energy and explains how electricity and fossil fuels are energy sources.

Ramps are simple machines used for work and play. Workers use them for easy loading and unloading. Skateboarders use them to do tricks. Readers will learn how ramps make work easier and how they are used in everyday life.

We use wheels and axles several times every day. Young readers will learn how a wheel and axle work together, how they make work easier, and how they are used in larger, complex machines.