Burr Puzzle/Chinese Cross Puzzle

myminifactory

    Burr Puzzle aka Chinese Cross/Puzzle Knot is an interlocking puzzle and it is the oldest of its kind. It is originally made of wood and nowadays they are made up of metals and plastics as well. It has 35 billion possiblities of arranging, out of which there is only one way to get the perfectly interlocked final cross. It is a fascinating puzzle and it also has patents on it. Also when all the six pieces are arranged mutually perpendicular they form a solid cuboid.