This "Holiday Merry-Go-Round" is one of the "Mr. Christmas" offerings
this year; it's called "Worlds Fair Carousel", with 170 lights,
15 tunes and 15 Christmas tunes, 8-1/4" diameter discs.  It uses a
wall pack to power it.  Locally (greater Detroit) it sells for about
US$ 109.00, probably less after the holidays.

The Mr. Christmas web site is  http://www.mrchristmas.com/ with a whole
lot of other interesting mech/music making items.  They also have a
bigger one, "Holiday Around the Carousel", 15" diameter, 30 songs, with
some lights.  These are the most common in the general-type stores.
They also have an assortment of other ones and music boxes and small
disk symphonium's (their trademark), with or without bells.

Another web site is http://www.domestications.com/  They have a large
(about 16" diam.) one song 4-turn wind-up with 12 carousel animals of
assorted styles and types.

Hope this helps
Glen R Perye Jr