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Sphere shape 9 green 9 red 9 yellow 9 blue (4 of them are like a window) Cone pieces 4 green 4 red 4 yellow 4 blue Quadrant piece 1 green 1 yellow Cylinder piece 2 green 3 red 3 yellow 3 blue 3 instruction guides Curved Interlocking Joints: Unlike classic flat-faced geometric toys, Polydron Sphera utilizes unique clip hinges specifically engineered to map curved surfaces seamlessly. Helper Tool Feature: Connecting spherical segments requires a technique where pieces are laid flat on a specialized "helper piece" to snap together comfortably. The final piece of a sphere typically includes a triangular hole to accommodate easy hinge closing and act as a stabilizing stand so the assembled ball won't roll away.