If Teddy Ruxpin had tried harder to keep up with technology he wouldn't have risen from the grave using proprietary digital cartridges. Instead, he'd have a smartphone dock embedded in his torso like this Japaese Cocolo Bear does.
Available sometime this month for about $62, Cocolo connects to almost any phone using its headphone jack. So even if a company announces a new docking port for its handsets every month, whatever device you're using will be able to power Cocolo's sound activated moving mouth. There's also an accompanying app you can download that presumably adds to the cuteness factor, but why just entertain your kids when you can terrorize them by recording a custom message in your own voice?