Burr Box - Wooden Puzzle Brain Teaser

The Burr Box is an unusual puzzle. At first you have a box which you must determine how to open and that won't be easy. Now when the box is open, you will find out it has 6 pieces (each side of the box is a piece in the puzzle), however, there are notched sticks attached to each of the 6 sides of the box. They will interlock when assembled properly to reform the box (cube shape). This structure adds one more layer of complexity to the puzzle.