We had some old trunks "full of treasure" int the cave for the genie to hide behind until needed. At the point that the genie needed to appear we fired a very small CO2 powered confetti cannon that created about an 8' cloud of silver confetti that fluttered to the ground as the genie stepped out from behind a trunk. The effect was perfect except that the cannon they sent us was defective and it didn't work very reliably. As a back-up we had a small sears 19.2 volt blower/vacuum that we stuffed the nozzle with confetti and used the blower mode to shoot the confetti That worked well as a backup. By the second night we wound up using both at the same time. That way we got a little extra in case the cannon failed and at least we got something if it didn't. At any rare, the confetti did the trick. The method of delivery will be the challenge. And of course the clean-up. Expect to find confetti around for at least months :-)

Not that I know of, but there might be restrictions in some jurisdictions. The one we used was small and intended to be hidden inside of floral arrangements at a banquet or other event needing glitz.