Electronic Magic does not have to be expensive.
Magic: Call a spectator and show a wooden box. Also show a desk Bell. Everything can be examined. Next step, you get your deck of playing cards, and ask him to say "stop" any time: The chosen card is handed to the spectator and he can sign the card. Now, there is only one card in the deck with your signature. I will shuffle the deck and place it on the table. I would like YOU to pick up the cards one by one, and place it inside the box. At a certain moment, when the spectators places one card, the Desk Bell rings!!!! Stop! pick up the card: it is your card !!!! Of course, many other efects can be performed, created by yourself. You receive the box, desk bell, a remote control for the desk bell (so that you can use it without the box for other effects. You receive the box, Desk bell, charging devices for the batteries, instruction manual, gimmicks, etc. You use your own deck of cards.