The Way Things Work-great resource for simple machines. Check this out from the Library. http://www.houghtonmifflinbooks.com/features/davidmacaulay/
Project Descriptions-Rue Goldberg http://TeacherWeb.com/NY/HooverMiddle/StawisuckWebQuest/index.html
Rube Goldberg Game-Make a simple task complicated. http://pbskids.org/zoom/games/goldburgertogo/rubegame.html
Phineas and Ferb - Chain Reaction game http://disney.go.com/xd/phineasandferb/games/chainreaction/