Beautiful Close-Up Fooler!
Display a wallet with a small square in the middle.
A mirror, attached to a ribbon is passed around for inspection, then inserted into the wallet.
A die is also inspected, no trickery at all.
The die is placed in the square in the wallet, then, bit by bit, it very slowly sinks until it completely penetrates the mirror and drops to the floor.
The die and mirror are once more passed around for examination.