A tetrahedron puzzle to go with your Christmas Octahedron. This puzzle has two pieces which can be snapped together. You just need to find the correct orientation and rotation to assemble it.
The tetrahedron is about 4 cm or 1.5 inches in height. The spheres are 15 mm in diameter. I have added a loop to the puzzle, but you will have to supply a loop of thread for hanging.
Follow this link for a 1-page pdf with assembly instructions.