This is a model christmas tree printable on the makerbot with a slot to insert a coin battery and an LED to illuminate the piece from inside! Merry Christmas and Happy Printing!

Update: corrected a bug in the model that made it print without the base!

Also, this updated version is smaller then the previous one avoiding some problems while printing the top

Just print the tree, insert the coin battery between the LED legs as in a throwie ( http://www.instructables.com/id/LED-Throwies/ ) and insert the group in the slot on the bottom of the Thing