Simple Machines Activity

http://www.edheads.org/activities/simple-machines/frame_loader.htm


http://www.harcourtschool.com/activity/machines/simple_machines.htm


And information:


http://www.mos.org/sln/Leonardo/InventorsToolbox.html

http://atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm