Money multiplies, just like magic. If this trick was good enough for Okito, then it's certainly good enough for you. The spectator is offered several coins. In order to preclude the possibility of any sleight of hand coming into play you tell them that you don't want to touch them and to count them onto a small tray. The change is then dumped from the tray into the cupped hands of the spectator. When they count the money in their hands again, it is found to have multiplied. If you can pick up a tray, you can do this trick.