The spectator selects a card from a deck of cards and remembers it (E.G. 9 of Hearts). It is returned and lost in the deck. You spraad the cards on the table and bring out your keys. You dangle the keys over the cards pertending that the hanging key will start to move when it comes near the chosen card. But it doesn't insteda the key holder has transformed from an oval shape into a heart, with the number 9 printed on it. Complete with special oval-heart key holder and instructions.