Quiver by Kelvin Chow Pocket-Sized Quick as a flash you

Quick as a flash you hand your plucky spectator your lollipop and ask them to wave it over the incorrect card just like a mini magic wand

IT DOESN'T REQUIRE ELECTRONICS EITHER

turn it over and then make a unique mark on it by making the holes that spectator wants with a punch

this is very

Quiver by Kelvin Chow Pocket-Sized Quick as a flash youQuiver is a revolutionary new switching device that is disguised as a standard looking coin pouch. Granting you the power to switch any small object for another automatically. The second the wallet closes, it's DONE. The most unbelievable part of Quiver is the fact that the spectator can open or close it themselves. They'll find nothing. You can let your spectator freely handle the pouch with full confidence that they will never discover its devious