2SceinceForces

Brain Pop, Jr. Movie
http://www.brainpopjr.com/science/forces/pushesandpulls/ http://www.brainpopjr.com/science/forces/simplemachines/

Foss-Balance & Motion
http://www.fossweb.com/modulesK-2/BalanceandMotion/index.html

Foss-Levers & Pulleys
http://www.fossweb.com/modules3-6/LeversandPulleys/index.html