Mind over matter, aka using your very own brainwaves to manipulate physical objects, is no longer science fiction. Two toys that employ this concept will hit the market in time for Christmas.
The future is here and it's gonna be awesome.
An article about this (with a cool video embedded) appears here:
http://www.washingtonpost.com/wp-dyn/content/article/2009/04/22/AR2009042204036.html
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