Listen to the Music...

I hope you enjoyed watching the Eurovision with me in my last post!  If you watched the videos, you may have noticed some very unique musical instrument in Switzerland's music video.  One in particular consists of a keyboard, but playing the keyboard alone won't make any music - you  have to do something else to this instrument.  Since I'm somewhat obsessed with unique musical instruments, it caught my eye.  A point if you can name it.