We've been trying to wake up Digby my Aibo from ages back. The Sony Aibo was a very ambitious project by Sony to make a robotic pet. I got one a while back just as the product was winding down. I've not played with Digby (as we call him) for a while, but once we'd given them a good charge, one of the Lithium Ion batteries got him going.
Unfortunately there's something amiss with his head. When he moves to certain positions it seems to think that the joint is stuck and he falls down. Next step is a bit of micro surgery looking for noisy potentiometers and broken flexible circuit boards.
But we'll get him sorted.