Click on the following websites to research simple machines.
Simple Machines
http://pbskids.org/dragonflytv/show/icebike.html
http://www.ehow.com/list_6022065_interactive-simple-machine-games.html
http://www.mikids.com/Smachines.htm
http://mint.ua.edu/games/simple-machines/
http://www.neok12.com/php/watch.php?v=zX554a617c740b6e45736e06&t=Simple-Machines
http://www.neok12.com/php/watch.php?v=zX456f665c6e047750031a67&t=Simple-Machines
http://www.neok12.com/php/watch.php?v=zX606b6c434d64714f5f6e59&t=Simple-Machines