Effect:

Fan out the Ace of Clubs, Diamonds and Spades to show your audience. Turn the cards over and put them on the table facing down. Get a spectator to tap on them three times, flip them over; the Ace of Diamonds has now changed to the Ace of Hearts..

Procedure:

1. The Ace of Hearts is among the three cards all along, when fan out the cards, make sure the ace of heart is shown to the spectators upside down, so that the heart is pointing upwards.
2. Place the upside down Ace of Hearts in the middle of 3 cards with the other two cards overlapping it just enough, so that only a red diamond shape is shown to convince the audience that they are looking at the Ace of diamonds.
3. Besides that bit, the rest is all showmanship and it depends very much on how you perform to be able to amaze your audience.