Anti Gravity Puzzle

These little ball bearing puzzles provide an intriguing challenge. The cover flips open to reveal a classic maze puzzle. So far so good. But if you then turn the puzzle upside down and view it via the mirror inside the lid, well, gravity appears to have been reversed. Tilt it down, and the ball goes up, not down! Simultaneously confusing yet engaging, each puzzle can be played in two ways: Conventionally with the lid open or upside down, where the gravity appears to have been reversed!