THE MOST SATISFYING GADGET - The CMYcube is a transparent acrylic cube with cyan, magenta, and yellow on each face. As the angle changes, the light mixes through the cube into green, red, blue, etc. When all three colors are mixed from the corner, you can see most colors and a smaller cube is created inside the cube, which definitely blows everyone's mind. PERFECT FOR DESKTOP DECORATION - This 40mm CMY cube is a fantastic decorative piece for your office, bedroom, living room, or anywhere else. It will create an artistic atmosphere that can not only lose people's nerves but evoke their wildest imagination. GREAT STEM/STEAM TOY - This cool cube is not only an optical illusion cube, it's also a subtractive color mixing demonstration cube, perfect for kids to learn about the CMY color scheme. REDUCE STRESS AND ANXIETY - Best for relieving stress and anxiety and killing time. Gaze into the cube and observe how the beautiful color changes, which will calm your restless mind and reduce stress. THE PERFECT GIFT FOR ALL AGES - The ultimate small indoor or outdoor toy for all boys, girls, men, and women, school children, and office workers. Warning: Not suitable for children aged 4 and under. Give as a gift for birthdays, Christmas, and other holidays, as well as get-well-soon presents.