The two pieces must be printed twice. The pieces can then be assembled with a rod passing through the middle. The rod can then be lashed to the tree to hold up the topper.

I printed this at full scale with natural PLA. The crown shape could be printed on my Printrbot Simple Metal, but the star shape had to be printed on a friend's CR10.

I lit up the interior using two strands of battery operated white LEDs that I bought from Amazon. "Led String Lights 6 Pack KingTop Fairy Micro Lights 2M 20 LEDs Battery Powered Silver Wire Waterproof Lights for Holiday Party Wedding Centerpiece Bottle Decoration"