A card is selected by the spectator and
thecard get lost in the Deck One touch by the magician finger
and the card visually appear in the box,the card then is handed out as souvenir.

the gimmick works for ever or at least until you get board of it
There are no flaps, wires, Chichi magnets or hidden levers.
as a bonus routine you can change the card in the box to choosing one with the spectator signature

The gimmick is as easy to construct and even easier to use by giving the box a Flick or Click however you wanna call it