Take a look! These unique child - size glasses and interchangeable lenses let students observe the world while learning about color. Features 8 easy - to - change lenses - 2 each of red, yellow and blue and distortion lenses that let you see the world like a bug. Teaches primary colors as well as mixing to make secondary colors by combining up to 2 lenses per side. Allows additional instruction and kaleidoscopic fun when you use the lenses on their own. Includes color - mixing chart. Durable plastic glasses are sized just right for children, and wipe clean with a damp cloth.