Mind Game by Uday Jadugar (6589)

You show 8 colorful cards with 8 different flags from different countries on each card, so 64 in total. A spectator chooses one flag from all these flags without telling you which one it is. The cards are then shuffled by the spectator so that you cannot know which flag it may be.

You then take the cards and ask if the spectator remembers what colors his flag had and what color his country was printed in on the card. The spectator has often already forgotten this, so you show the cards again one by one and then you exactly knows which of the 64 flags the spectator has chosen.

Very easy to perform (almost self-working). Complete with the colorful cards (22 x 15 cm), pouch and online video instructions.