Incredible Traffic Lights (DOZEN).
Don’t be put off by the relatively cheap price of this effect because it’s a stunner. The best part is that the magic happens in the SPECTATOR'S HANDS! Show 2 cards - one with 3 coloured spots on it, the other is completely blank. Place both of the cards in your spectator's hands, and in an instant, the green spot jumps from one card to the other. Resets instantly, and is incredibly simple to do! Works itself.
Incredible Traffic Lights (DOZEN)