Come in and see this exciting series of books by David Glover.
SIMPLE MACHINES — Paperback, Science, Picturebooks
This series reveals how the most complicated machines rely on very simple principals of technology.
These books feature – large, clear photographs & artwork, Fact Boxes on almost every page, and activities to put what you learn into action
Titles in the series: Wheels and Cranks, Springs, Pulleys and Gears, Ramps and Wedges, Levers, Screws