> What puzzles me most is that there is an opening in the top of
> the dome plugged by a cork.  Now, at first I thought it was to put
> water for the tree, but the tree holder is totally separate from the
> container, and just sits on a spindle and rotates as the music plays.

I suspect that you can pour water into the hole (closed by the cork)
to add weight to the stand for stability.

Eric Stott