This is great. I wish I had seen it before I did the unit on color with the kids in my after school club, although they did have their minds blown slightly when

This is great. I wish I had seen it before I did the unit on color with the kids in my after school club, although they did have their minds blown slightly when I made the screen on my cell phone all yellow and then put it under a microscope so they could see that there were only red and green pixels illuminated - no yellow light coming off that screen at all, it was all in their heads.