In the 1970s, Bill Cutler and Arthur Cross started analyzing burr puzzles, calculating how many different ways the pieces could be shaped, and the number of burr puzzles you could create from those pieces.
| Brand | Curiosity Box |
In the 1970s, Bill Cutler and Arthur Cross started analyzing burr puzzles, calculating how many different ways the pieces could be shaped, and the number of burr puzzles you could create from those pieces.