http://www.ted.com/talks/david_merrill_demos_siftables_the_smart_blocks.html Captivating video that demos the use of blocks as computers. Obviously some orientation and proximity sensor stuff going on here, too.
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On YouTube: http://www.youtube.com/watch?v=YZzQycqjIfY Check out the cool accelerometer-controlled spaceship starting around 1:08. Now if only I spoke German. Hope he's not saying anything untoward. ;-) (Thanks, Gavin, for the link.)
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