Performer shows four jumbo size Aces (Ace of Spades, Ace of Hearts, Ace of Clubs and Ace of Diamonds) to the spectators. He mixes the cards and puts them inside four envelopes, so that the spectators cannot keep track of which one is which. He also displays four small size Aces and mixes them. He puts them inside the four envelopes with the jumbo cards, according to the free choice of the spectators. When he removes the jumbo and small size Aces from the envelopes the suites of every pair match!
No forces - easy to do with the special props supplied.