Luban ball is a kind of traditional Chinese toy, a kind of 3D puzzle. It is made of 6 pieces, and together they locked inside. The diameter of ur ball is 120 mm,  much bigger than normal Luban balls, but this size is maybe better for milling, for the milling machine is not good at small scaled details. The material is 19 mm MDF.   Click here to watch the video ? BALL~1