In order to perform a prediction card trick, you will need the following: a deck of cards, the box the cards came in, a pen or a pencil, and paper.
With this trick, you hand the deck of cards to a bystander. In advance, remove four black cards from the deck, and place them in the box. Tell the bystander to shuffle the cards as much as they want. You write down your prediction on a sheet of paper and set it aside. Your prediction should be, "There are four more pairs of red cards than...