You know how your dog wags his tail when he's happy? Well, now you can too.

The tail for humans, called Tailly, is attached to a belt that you wear around your waist. The belt has sensors that read your heart rate – and the tail will move according to your mood.

The developer, Shota Ishwatari, just finished up a Kickstarter campaign with the hopes of releasing Tailly by August; unfortunately, the page says "funding unsuccessful." Hopefully he can wag up a little more interest ... (NYDailyNews.com)