There is a very basic three card trick. You turn each card up one at a time, showing that all three cards are the same(say king spades). End with all three face

There is a very basic three card trick. You turn each card up one at a time, showing that all three cards are the same(say king spades). End with all three face down in your hand. Then you show all three cards again and all three are a different card(king hearts). At no time are there more or less than 3 cards in your hand.