'The '''Weighted Companion Cube''' is an inanimate object used to solve puzels in the Valve game Portal'
A desktop toy of the weighted companion cube has been confirmed for release in late 2007.
http://en.wikipedia.org/wiki/Weighted_companion_cubeQuote from: First Version of Page 'The '''Weighted Companion Cube''' is an inanimate object used to solve puzels in the Valve game Portal'