Pulleys Pull Their Weight: Simple Machines for Kids by Andi Diehn, A pulley is one of six simple machines that are designed to maek different kids of work such as lifting, pulling, pushing easier. If an elephant sat on your book and refused to move, could you lift it? Maybe, very carefully, you might want to use a pulley. Learn about forces and howe we can increase the amount we can lift simply by using a pulley. An introductory poem offers language connections while a hands-on activity at the end reinforces concepts in the book. Paperback, 32 pages.Recommended for ages 5 to 8 years old.
