Astronauts

Heavy-Duty Trucks

Veterinarian's Tools

Police Officer's Tools

Benjamin Franklin

From Wax to Crayon

Michael Faraday

Bulldozers

What Does It Do? Fire Truck

The Red Cross

Building Your Own Robots: Design and Build Your First Robot!

The Construction Alphabet Book

Concrete Mixer

From Iron to Car

What Does It Do? Ambulance

How Fighter Jets Work

How Do Tanks Work?

Dump Truck

First How Things Work Encyclopedia: A First Reference Book for Children

What Does It Do? Dump Truck