Tethered levitation of heavy objects.
Floating cube & wrench
The magnetic floating stand is built from wood and a plastic food container
holding about five large powerful disk magnets. You can get similar magnets (but
with center holes) from microwave oven repair people who replace magnetrons. The
photo cube has a magnet in the top of it. The heavy 8 inch wrench is tethered
about an inch below the magnet!
Magnetic Levitation - Science is Fun