Four puzzle pieces assemble into an interlocking octahedron. This puzzle is similar to my "Screwy Octahedron" except it uses three identical screw-shaped pieces. This puzzle would be difficult to make in any way other than 3D printing due to the complex 3D shapes of the pieces. Assembly requires coordinate motion.

Notes: Uses 13mm diameter spheres. Screw piece have offset 0.1mm, Y piece has offset 0.0mm.

Only a single copy of this puzzle exists.  It is quite expensive and I am not sure if the tolerances in metal are good enough to reproduce it reliably.

A version of the Koch fractal ornament designed for the frosted ultra detail material.

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.

A box packing puzzle invented by Leonard Gordon more than 25 years ago. Originally devised from pieces made from joined spheres, here I use truncated rhombic dodecahedra or edge beveled cubes. The eight pieces are identical and sized so that they fit in a golf ball case.

Four of the pieces can also be interlocked to form a truncated tetradedron. This is a second puzzle, called "Blossom".

Golf ball case box on amazon.com.