You display an envelope which you claim has a card bearing the image of a playing card a spectator will select. A spectator is asked to select a card from a deck. You now remove a card from the envelope, which is otherwise empty, and the card has the images of all the 52 cards in the deck. The audience has a laugh – they think it is a gag. You ask the spectator what their selected card was, and as they name it, the 52-in-1 card immediately changes into a Giant replica of their selected card. We supply you the special card, in an envelope, ready to work.
