A car breaks down on the road and the driver pulls over to call a tow truck. The tow truck will take the car to a repair shop! Find out the different parts of a tow truck and how it is able to transport other vehicles.

Many students ride these large, yellow buses to school every day. School buses make sure children get to and from school safely. Now kids can learn about these vehicles and how they work.

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.

Gases, liquids, and solids are all matter. Everything that has mass and takes up space is matter. This book instructs eager learners about the different forms of matter and explains how matter can change forms.

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.

Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials. Elevators use pulleys to move up and down. Kids will learn how pulleys make work easier and how they are often part of complex machines.

Have you ever seen a big truck on the highway? That is called a big rig. It transports many of the things we use in our everyday lives. Read about the different types of big rigs and how they transport cargo.

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.

Clear the road for the speeding ambulance! These vehicles need to get to an emergency as fast as possible. Learn about the equipment an ambulance carries and how ambulance workers save lives.

Gravity keeps people grounded and prevents them from floating away into space! Young readers will learn how and why gravity works and discover how to measure it on Earth.