Everyone has them. Im not kidding they are so famous. My friend just bought one that there was only 1 made of its kind. I think it was a tera. Something like that.
I don't know what it is, so I looked it up, and I still don't know what it is. I just know I've never seen one in my life, and last time I checked, things like that don't fall under the category of "famous".
The clacking noises these things make are annoying especially when there's someone who's repeatedly trying to master all three cups and the spike. I'm not sure how anyone can stand the noise of two pieces of wood clacking against each other.