A rectangular puzzle fits perfectly into a frame. The magician adds a new piece and reassembles the puzzle, but somehow they still form a rectangle of exactly the same size—a Perpetual Puzzle. The puzzle still fits perfectly in the frame. When you add another piece and rebuild the puzzle, the puzzle impossibly still forms a rectangle of exactly the same size and fits perfectly within the same frame.

This magical riddle is a masterpiece of ingenuity. The more you add, the more everything stays the same. Although your audience may suspect that rearranging pieces makes this baffling puzzle possible, they will never suspect that the frame and the cardboard also contain subtle gimmicks. It is this disarming combination that allows you to perform a truly impossible illusion.