Take a deck of cards and shuffle a bit. Then take pairs of cards and use your psychic skills to "guess" which one in the pair is higher and then place right answers on one side and one on the other. Play with the feeling of "knowing". This is very interesting especially for skeptics attempting this - if they suspend their "knowing" that it's all chance, where do their feelings take them?
So far I've run through 4 shuffles of a deck.
I got 15 and 11, 16 and 10, 14 and 12, and 21 and 6 (I had 2 jokers in that deck).
That puts a total correct of 66 out of 105. We'll see how that goes.