On water glasses (incredible)
https://www.youtube.com/watch?v=XKRj-T4l-e8
And on the glass armonium:
https://www.youtube.com/watch?v=QkTUL7DjTow&list=TLPQMTgwMTIwMjB0of7w7ipRng&index=1
Enchanting.
Lovely, times 2.
Thanks, Mrs. Don-O!
https://www.youtube.com/watch?v=VSK_qObahWY
Above is a video that was linked to yours that shows the basics of the armonica and how it works - from the tv show Mr. Roger’s neighborhood! Pretty neat.