THE MOST SATISFYING PRISMS - CMYcube is a transparent acrylic cube with cyan, magenta, and yellow on each face. As the angle changes, light passes through the cube blending into green, red, blue, etc. When all three colors mix from the corner, you can see most colors and a smaller cube forms inside, which definitely sparks everyone's imagination. PERFECT FOR DESK DECORATION - This 40 mm CMY cube is an excellent decor piece for your office, bedroom, living room, or anywhere else. It creates an artistic atmosphere that not only can soothe people's nerves but also ignite their wildest fantasies. LARGE STAMPS/ANGLE DECORATIONS - This cool cube isn't just 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 - Ideal for calming stress and anxiety while killing time. Look into the cube and watch the beautiful colors change, which will soothe your restless mind and reduce stress. THE PERFECT GIFT FOR ALL AGES Ultimate indoor or outdoor toy for boys, girls, men, and women, students, and office workers. Warning: not suitable for children under 4 years old. Give as a gift for birthdays, Christmas, and other holidays and become fresh soon-presented.