Jack 4 You by Masuda Magic
Cards are set on the card stand. Audience chooses one of the suits of the Jacks. (Let's say Hearts) When the magician spreads the cards, only Jack of Hearts is facing the audience. Also the back color of the Jack of Hearts is different from others. Finally, magician reveals the rest of the cards and they are all 4's. (4 of spades, and 4 of clubs)
ANY SUIT can be freely chosen!
No Technique Needed!
Great for beginners and Professionals!