"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This bo

A hands-on approach introduces young scientists to wheels and axles. Science theory and practical, fun projects teach the physics and the technology behind this

Introduces six simple machines, describing how they work in more complex machinery and how they are used every day.

This is a unique interactive guide to understanding simple machines and mechanisms. Each page introduces you to a key mechanical principle that you put into pra

Introduces simple machines, including screws, levers, wedges, and pulleys, describes how each makes everyday life easier, and provides activities demonstrating