A magician shows 3 Kings and places them face down on the table. He then takes out 1 Card from his pocket (An Ace) and replaces one of the Kings with the Ace.
He now picks up the 3 cards on the table and turns them over. They 3 Kings have now become 3 Aces.
A Great inexpensive card trick! Easy to carry around in your pocket to wow your audience and friends.