Simple Machines

by Barbara Duffey

Oh! That's how it works! Simple Machines Set lets kids understand the how and why of things in their world. By building 5 basic models - lever, pulley, inclined plane, wheel and axle, and wedge - all at the same time, they'll learn how simple tools make a complex world easier! Includes over 60 pieces plus an activity guide for projects that explore effort, force, load, motion and distance. Great for projects and science fairs, too! Ages 10+.

Library Binding

Published August 1, 2002

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