By using 4 AA batteries, 1 CD, an empty Pepsi can, a playing card, tape roll and a dime you can make some kind of funky levitation device. From the information I can find, it uses discoveries found by John Hutchinson and the Casimir effect which according to sources, is related to resonance and physical forces between objects. I'm not even going to try understand all that as it isn't the point of this post. Anyway, check out the video below and see the playing card and dime levitate before your eyes. If anyone can make on of these then feel free to post a video and I will post it here.
Secret Science Anti Gravity Revealed Homemade - video powered by Metacafe