25-Piece Burr Puzzle Set with Box

This ancient style of puzzle dates back possibly farther than any documented history of it, and is one of the oldest styles of three-dimensional puzzles we know of. An assembled burr puzzle uses six sticks of nearly-identical shape, the unique notches of each burr interlocking in a way that's hidden when the puzzle is fully assembled. What makes this set of 25 burrs extra challenging is that, theoretically, you can pick any six burrs at random and usually find a way to interlock them together.…

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