THE MOST SATISFYING GADGETS - CMYcube is a translucent acrylic cube with cyan, magenta, and yellow on each surface. As the angle is changed, 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 GREAT FOR DESKTOP DECORATION - This 40mm CMY cube is a great piece of dcor for your office, your bedroom, living room, or anywhere else It'll create an artistic atmosphere which 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 kids to to learn about CMY color scheme. REDUCE STRESS & ANXIETY - Best for stress and anxiety relief and kill time. Look into the cube and observe how the beautiful color changes, that 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. Caution: not suitable for children 4 years old and below. Give as gifts for birthdays, Christmas and other holidays as well as a get well soon gifts.