Describes and compares six kinds of simple machines, levers, pulleys, wheels, ramps, wedges, and screws.

"Machines help make work easier, like when you need to lift something heavy or reach way up high. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw. Can you adjust a seesaw to lift an elephant? What happens when you combine two or more simple machines? Read and find out!"Amazon website.

Kids use simple machines every day without realizing it. Teeth are wedges and so are knives, forks, and thumbtacks. Many toys such as slides, which are inclined planes, and seesaws, which are levers, are also simple machines. Two appealing kids and their comical cat introduce levers, wheels, pulleys, inclined planes, and more, and explain how they work. This lively introduction to physics will get kids excited about how simple machines simplify our...

Presents an introduction to the basic principles of such simple machines as the lever, pulley, ramp, wedge, and the screw, and describes how they are used in everyday life.

"Is it easier to move produce with a lever or a wheel and axle? Readers will learn about how simple machines work in this book for early readers."--Provided by publisher.

Introduces simple machines, including the different types of machines, how they function, and how they are used in more complex projects.

Simple text and photographs explain the basic science behind wheels and gears.

"Instructions for creating items using scientific methods"-- Provided by publisher.

"Describes how simple machines are used in construction and how they make work easier. Includes experiments"--Provided by publisher.