Burr_Knot_Puzzle

A burr puzzle is an interlocking puzzle consisting of notched sticks, combined to make one three-dimensional, usually symmetrical unit. These puzzles are traditionally made of wood, but versions made of plastic or metal can also be found. This is a simple three piece puzzle in which the three pieces must be combined in a particular way to create one, 'solid', stable piece. I have had the wooden puzzle for years and thought this might be an interesting one to try on my 3D printer.

The three pictures show how to solve the puzzle.