THE MOST SATISFYING GADGET - The CMYcube is a translucent acrylic cube with cyan, magenta, and yellow on each surface. As the angle changes, the light through the cube mixes into green, red, blue, etc. When all three colors are mixed from the corner, you can see the most colors and a smaller cube is created inside the cube, which definitely blows everyone's minds. PERFECT FOR DESKTOP DECORATION - This 40mm CMY cube is a great decor piece for your office, bedroom, living room, or anywhere else. It will create an artistic atmosphere that can not only loosen people's nerves, but evoke their wildest imagination. GREAT STEM/STEAM TOYS - This cool cube is not only an optical illusion cube, it is also a subtractive color mixing presentation cube, perfect for children to learn about CMY color schemes. REDUCE STRESS & ANXIETY - Best for relieving stress and anxiety and killing time. Look 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 Ultimate small indoor or outdoor toy for all boys, girls, men and women, school students and office crowds. Warning: not suitable for children 4 years and younger. Give as gifts for birthdays, Christmas and other holidays as well as get well soon gifts.