Lever, Screw, and Inclined Plane: The Power of Simple Machines by Gare Thompson
	List Price:   $17.90 Unit Price:   $14.32 You Save:   $3.58 (20%) ISBN-10:   0792259491 ISBN-13:   9780792259497 Publisher:   Random House; National Geographic Society Category:   Science Books Pub. Date:   September 2006 Pages:   48 Format:   Library Binding Ages:   6 to 9
Description/Notes
How simple machines work and how they help us live our lives.