Perhaps some of you would be interested to see this (rather pricey)
children's educational toy, a barrel-operated xylophone:

http://www.swissmade.ch/naefusa/produkt_detail.cfm?vShop=61&vId=1&spr=1 

It's evidently been around for a while, although I've never run into
one before.

  "Designed by Herbert Bächli in 1983 for Naef Toys, Switzerland,
  Gloggomobil is based on the principle of the barrel organ and helps
  to introduce a child to the world of music.  When the black pegs are
  pushed into the holes on the drum and the simple turning mechanism
  is set in motion, melodies can be heard.  A child can also produce
  bell-like sounds directly with the drumsticks on the detachable
  xylophone.  Instead of just listening to music, a child will enjoy
  being able to compose music as well."

So maybe the love for mechanical music _is_ reaching the next generation?

Todd Augsburger - Roller Organs
http://www.rollerorgans.com/

 [ This instrument has been displayed (rather inconspicuously) for
 [ many years at Schwarzwaldmuseum, Triberg, Germany.  It plays ten
 [ metal bars.  -- Robbie