Simple Machines
Learn about the different kinds of simple machines
http://www.mikids.com/Smachines.htm
Cosi Science Center
http://www.cosi.org/downloads/activities/simplemachines/sm1.html
Learn about the different kinds of simple machines
http://www.mikids.com/Smachines.htm
Cosi Science Center
http://www.cosi.org/downloads/activities/simplemachines/sm1.html