Here’s an instrument I didn’t know about: the Skoog. Apparently, it was designed for people with special needs, and they even talk about music therapy on the website. This video (by comedian Brett Domino) is a good demonstration of it in a comedic setting – well, I think it’s funny.
For more on the Skoog, go to http://www.skoogmusic.com/. If it didn’t cost $850, I might be thinking more seriously about getting one.