Start with a deck of cards. Before the trick, sneak a peek at the 10th card in the deck. Memorize it. Ask your volunteer to add the first and second digit of their number together. For instance, if he ...

How can Harry make equal slices in a banana before it's peeled? It's magic! Harry's helper waves a "fractionating" finger at an unpeeled banana, then Harry peels it to reveal five equal slices!