They'll be desperate to know how you did it!
A classic card magic trick that will definitely blow them away!
Here's the effect: Let your spectator remove a card from the deck and sign it. Shuffle it back into the deck. Placing the deck behind your back, you brag that you can locate the spectator's card INSTANTLY, even without looking at the deck. When the spectator takes your challenge, you point to a small wooden box that has been sitting on a table in front of you the whole time. Picking up the box FOR THE FIRST TIME, you open it and dump the contents into your hand- IT IS THE SPECTATOR'S SIGNED CARD!
This beautifully constructed card box will make you the talk of your magician friends! It has a real WOW effect. And it looks great displayed on your magic library shelf!