| Designer | : | Bill Cutler |
| Craftsman | : | Jerry McFarland |
| Category | : | Interlocking |
| Material | : | Cherry |
| Pieces | : | 11, plus 5 ball-bearings |
| The burr contains four ball-bearings like the one in the foreground. The object is to disassemble it and add the fifth. So far, I haven't even managed to get it apart! | ||