13 hands-on activities encourage children aged five to nine to explore simple machines (the lever, wheel and axle, pulley, inclined plane, screw and wedge) and

"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

Create 3D printable models that can help students from kindergarten through grad school learn math, physics, botany, chemistry, engineering and more. This book

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

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