Ink Permeation by DingDing
With a Sharpie, you draw a line on a selected playing card. You then borrow a coin and it magically passes through the ink line that they just saw you draw on the card! Just like a coin-slot! You then remove the ink line from the card, and the card is shown to be whole, with no slot in it at all!
Easy to do.Easy to make.Download it today!