If anyone is interested in "toy" automatic music machines, check out page 30
of the latest Hammacher Schlemmer catalog.  They have a "Santa's Elves'
Magical Player Piano".  The interesting twist is this toy piano is designed
to be placed on top of a real piano keyboard.  10 little elf feet protrude
from under the toy piano keybed and actually push down the keys of your real
piano to play 22 different Christmas carols.  I am not sure how they develop
enough "torque" to make the feet push the piano key down, instead of just
lifting the little toy piano "up"...

It would be interesting to see if they are using some sort of MIDI
electronics inside.

At U.S.  $119 it is a bit pricey, but definitely cheaper than the $16,000
Pianomation offering.

 --Bill Jelen¶
http://users.aol.com/BamRolls