Remove three 3's from any deck, hand them out for full examination. The 3's are slowly but surely mixed in between 3 indifferent cards.
Without any moves or switching, the 3's separate themselves from the other cards.
This is repeated a second time with the 3's face up, they are again mixed in between any 3 regular cards in the cleanest, fairest manner. Again the cards separate from each other.
Complete with two gimmicks and routine.