You know how your dog wags his tail when he's happy? Well, now you can too with the Tailly, a tail for humans with sensors that wags the tail when you're happy.
The developer hopes to release Tailly by August; unfortunately, the page says "funding unsuccessful." Hopefully he can wag up a little more interest. Maybe he should get a few celebrity endorsements. I can think of a few who could put it to good use.