I picked up two versions of the brass hot rod yesterday. One allows for 3 different colors without reset, and the other allows for 3 different colors, a reset, and then 3 more colors. Anyway, here's the idea..
"I was in a flee market and found this antique colorblindness test for physicians to diagnose patients....." Show multi colors on both sides to one viewer, then turn to another and show all one color..... hmmm, "Maybe you're color blind." back to the other person with all colors, then to the 'patient' again with one color. Then talk about how some people get angry when they learn they find out they may be colorblind. show them all red (people "see red" when they are angry)
To avoid possibly angering someone, it might be better to 'hypnotize' them into colorblindness than making them 'think' they are?????
What do you think?