A Card Worker's Classic!

A spectator freely selects a card and returns it to the deck.You shuffle the deck, losing the selected card.  Spread the cards face down on the table so that they completely cover the surface.  Explain you'll find the selected card in a very clever manner.

You display a little wooden car, it will give you a hand finding their card. You push (drive) the Car Buggy across the face-down cards. The Car Buggy stops on one card locking its brakes! This card is turned over, it's the selected card!

Solid Wood and Rubber Tires

Effect made famous by Juan Tamariz on a national television special.