Thirteen experiments about the six simple machines --- the lever, wheel
and axle, pulley, inclined plane, wedge and screw --- teach kids about
basic science. Full-color photographs and step-by-step instructions
clearly explain each activity, so that kids can make the most of the
machines with minimal help from adults.Part of the Starting with Science
series, Simple Machines encourages children to have fun as they learn
basic science and fills a need for primary-level science resources.