Introducing the regular octahedral "CMY Cube" with the three primary colors of light arranged on the sides. It is a mysterious object that can reproduce various colors by letting light pass through it, and changes to a different color when you move it. Recommended as a layout by stacking several pieces or as a gift! The scientific yet cute design on the drawstring bag and box is also attractive. This is a gradation cube that you would like to place in a small space such as a window or desk.