The magician fans a pack of poker-sized Bicycle cards merely to have someone think of a card. Magically, the named card proves to be the only odd color backed card in the deck. Then the magician repeats this with a second spectator and a different card. Then all of the card faces change to red, and then all to black, and then back to normal. For the big finale, the magician cuts the deck into two piles, revealing that each of the thought-of cards are now the only odd color cards in each half. WOW! Plus, you can hand out the deck. Thousands have been sold!