Do you like christmass tree decorations? Do you like puzzles? Here is a two in one combo.

The christmas tree ball ornament can be hanged, and when opened a maze puzzle is available inside. The bottom compartment fits a small text message.

The inner parts of the puzzle and the key are copy pasted from  “Twisty Puzzle Box" by 3DPrinty. The bottom and top pieces are custom from this model (external shape from “Spiralized Ornaments” by DaveMakesStuff). The original ornament model closed the ball tight, in this model there is different notch that makes the ball hold close, but is easy still to open when pulling appart.

I printed the bottom piece with supports (puzzle maze downards). The supported surface then requires some manual polishing to be passably enjoyable to touch. 

Albeit the puzzle is considered easy for puzzlers standards, out of five puzzles at Christmas this one turned out to be the most difficult for my cousins (university students age).

Other than the STL files, I also uploaded the STEP file of the bottom piece, you can also see it directly in onshape.

Looking forward to seeing if someone else prints this model. 
Tooks me hours to model (CAD software newby) and many flaw version prints to get right.

Thanks a lot to 3DPrinty and DaveMakesStuff for sharing their creations.