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How to Make an Anti-Gravity Top

An anti-gravity top doesn't actually defy the law of gravity, but it uses waves of magnetic force to levitate as it spins. The device is based on simple scientific principles of magnetic repulsion and gyroscopic force. Although you can buy pre-made anti-gravity tops, you can build one on your own in a few minutes.

Things You'll Need

3 8-by-1-inch ceramic ring magnets
1 1-by-1/4-inch ceramic ring magnet
Cork
Drill
1.5-by-1/4-inch dowel
Craft knife
CD jewel case

Instructions

- 1
  Stack three 8-by-1-inch ceramic ring magnets on a flat surface. You can find large magnets at electronics or science supply stores or online.
- 2
  Put a piece of cork through the center of a 1-by-1/4-inch ceramic ring magnet. Trim the cork with a craft knife if needed. Cut the cork so it extends about 1/4 inch above and below the magnet.
- 3
  Drill a hole through the exact center of the cork. Push the 1 1/2-inch dowel through the hole so that about 3/8 inch is protruding from the side of the magnet that is repelled by the stack of 8-inch ring magnets. This is important so that the top will float on the magnetic waves.
- 4
  Sharpen the short end of the dowel with a craft knife. The top will spin on this point.
- 5
  Place the CD jewel case on top of the stack of magnets. Put the top in the center and give it a good spin. Slowly lift up the jewel case, and when you get an inch or two above the magnet stack, the top should begin to float on its own. Remove the CD jewel case.

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