tree_ornament
This is a 3D-printable topper or ornament for a Christmas tree. It is a six-pointed star (i.e. a Star of David), in order to mix the two traditions.
The star includes a small cone on the bottom of it to help it stay on a tree. However, if it does not rest soundfully on the tree, this demo also includes a 3D-printable hook to mount to a wall or a nearby surface and use to hang the star.
Renderings
Here is a rendering of the star decoration itself:
Here is the wall-mountable hanger that you may choose to use if the star does not balance on the tree: