that is so beautiful. They have a real glass harp on display at the Corning Glass Co mueum in Corning, NY. It was popular in Europe for a time. Its a drum that tapers on one side, laid on its side, and water flows over it and it has a foot pedal (?) to make it turn and you run your fingers on the wet glass up and down it to play it. They said the sound was too pure for human ears to listen to and they banned its playing in the states (maybe in the 1700s?).
somewhere online I think they had a dvd of one being played (amazon most likely - I was looking specifically for the music) sharet