This puzzle looks a bit like the bigger Rattle Puzzle. The puzzle is made by 18 square sticks with pins on the outer sides of the sticks. These pins keep the pieces together. If you have put the puzzle together you get holes in witch you can put marbles for example.

In the diagram below you see the pieces used for the Polygon puzzle. In total you need 18 square sticks with a length seven times its diameter. Seventeen pieces have two pins and one piece (the key piece) just one pin. The holes for the pins has to be drilled in such a way that exactly five pieces can be placed between the two holes. The pins must not be to long: they must stick out less than the half of the diameter of a square stick.