Learn about light from a high school physics site! How much can you understand? Try the links to "refraction at a boundary" and the "archer fish" http://www.physicsclassroom.com/Class/refrn/u14l1b.cfm
adventure game - color Broken link - don't use
Color and light - you can control the angles and see how prisms and lenses refract light Writing is for high school or adults, but animations are cool. Molecular expressions
Mix and Match - Try to match colors by mixing light Mix and Match (#4 on worksheet)
Afterimage experiment - try it and read the explanation Bird in a cage (#5 on worksheet)
Try these optical illusion(requires Shockwave) Optical Illustions from exploratorium.edu (#6 on worksheet)
Test yourself for color blindness http://www.toledo-bend.com/colorblind/Ishihara.asp