| Screwballs Screwballs. Screwballs is an easy assembly puzzle, first designed and prototyped in May 2009. The puzzle has six identical rods with right and left-handed threads at the end, and four different balls, each with three threaded holes. The object of the puzzle is to assemble a tetrahedron. Because of the threading, the puzzle is assembled as an implosion, i.e. turning all the rods simultaneously and puzzling the- Screwballs. |
