The guy in this video claims to have created a homemade device that levitates a card using only a Nokia cordless phone, batteries, a coke can, and a CD. Hit play or go to Link [YouTube]
Skeptical? Me too ... although I couldn't see any concrete evidence that it was staged. There's even a video response that replicates the same experiment.
No circuits no force nothing.
Tried it. Its all some bull s#!t