Schylling Magnetic Gyro Wheel - Retro Spinning Toy - Balancing and Mesmerizing Sensory Gadget for Kids and Adults - Ages 3 and Up - One Piece;

Gravity- Defying -- To operate, simply place the wheel in the metal track, move up and down and watch with amazement as it magically (or scientifically) travels inside, then outside the 11" travel track. What's the secret? Hint: when electrons spin in the same direction, the metals become "magnetized" and will attract other like metals.