I really liked these sites!

Energy Science Made Easy

http://www.benweins.com/energy1.html#energy1.1

Physics for Kids

http://kapili.com/m/motion.html

About Physics

http://www.gomilpitas.com/homeschooling/explore/physics.htm

The following sites really aren’t relevant, but I cracked up so much after I looked at them I added them anyway.

Cartoon Laws of Physics

http://ousd.k12.caus/us~codypren/cartoonlaws.html

Physics of Cartoons

http://better-mouse-trap.com/physics/

The Laws of Physics for Cartoons

http://www.earthlink.net/~bokreveiwer/toon_laws.htm