Consider that you would likely have little to no control over such a tail. Also: Wardrobe issues.
There is a detachable tail that connects to an (allegedly) emotion detecting sensor. Alternatively, it can be controlled via remote control. It's sold by a Japanese company that also sells ears that are essentially of the same making. You'll probably find them pretty easily if you do a little digging.
Yatsufusa
Consider that you would likely have little to no control over such a tail. Also: Wardrobe issues.
There is a detachable tail that connects to an (allegedly) emotion detecting sensor. Alternatively, it can be controlled via remote control. It's sold by a Japanese company that also sells ears that are essentially of the same making. You'll probably find them pretty easily if you do a little digging.