Are crap!
http://www.wheelchairdriver.com/gopro/disk.mp4
Old vid. All SSD now
My magnetic floating solar spinny thing
http://www.wheelchairdriver.com/gopro/magic.mp4
Still spinning 2 years later. Except at night. But a laser pen works or a small torch from 10 feet away.
And then theres this!
http://www.wheelchairdriver.com/gopro/magnet2.mp4