8 years & up. Explore the basics of mechanical physics by building a series of simple machines designed to perform complex tasks that make our everyday lives easier. Build 26 working models focusing on six simple machines: wheels and axles, levers, pulleys, inclined planes, screws, and wedges. Learn the science behind your builds in the full-color, 32-page manual and follow the easy to understand step-by-step instructions to assemble each machine. As your understanding of mechanical physics… More »