The effect is this: You show a small wallet, folded in the middle with a small square cut in the center of each side. A mirror, attached to a ribbon, is placed into the wallet, blocking the holes. A die (singular for dice) is placed in the square hole in the wallet. Of course, it can't go anywhere- it is blocked by the mirror. But then, bit by bit, it very slowly sinks until it completely passes right through the mirror and drops through to the table! And YOU CAN DO this trick immediately!