Here are four printed metal parts (not six) and nine tungsten carbide bearings holding them together/apart.  Yes, there should be 12 bearings...but there aren't. 

Although it is a pure snap-fit, without adhesive or other cheating, I wouldn't class Holly as a puzzle, as it's rather difficult to get together, and once together, a very robust assembly. 

These three views highlight twofold, threefold and fourfold axes respectively.  There is only one complete threefold axis; the others are almost, but not quite.

Holly metal print with tungsten carbide bearings, 3 1/2" diameter - $360