The magician show the audience a Chinese coin, both sides of which are black. He rubs it a little, and both sides of the coin turn red. Another rub, and both sides of the coin turn blue. The coin can be examined. (NOTE) The Coin is bigger than US Half Dollar.
Jumbo Color Changing Chinese Coin by Joker Magic
@ $69.95
Color Deception
@ $19.95
ORIENT Express by Mark Mason
@ $84.95
Chinese Coin Vision by Joker Magic
@ $67.50
RBG by N2G