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Description
Find out how the six simple machines -- levers, pulleys, wheels, planes, wedges, and screws -- work, and how engineers put them to use. Build your own pulley system, experiment with levers, and more!
Find out how the six simple machines -- levers, pulleys, wheels, planes, wedges, and screws -- work, and how engineers put them to use. Build your own pulley system, experiment with levers, and more!
Reviews