Where celebrated, each country often has its own Christmas traditions.
A speciality of some regions of Germany is the
Christmas Pyramid
which consists of a framework topped by a pinwheel windmill. Candles
arranged around the frame give rising air to power the windmill, which
rotates the ornaments in the framework. You can probably find a selection
of such items for sale via
Froogle
(though being an American only site at present, there are limited imports
available there compared to those available in Germany).
Windmills also appear on other Christmas ornaments - such as
snowglobes.