Blockhead

Blockhead. This is an interesting and difficult puzzle designed by Stewart Coffin. 7 complex pieces will assemble sequentially to form a 4x4x4 cube.  This puzzle will really test your spatial relationship skills.  You will likely feel like a blockhead after working hours to solve this one....Measures about 2 3/4" cube.Excellent fits on this puzzle make it challenging to even dis-assemble; but of course- Blockhead.