Color Mixing Glasses Observe the world while learning about color. Unique child-size glasses feature easy-to-change lenses—2 each of red, yellow, blue and distortion lenses. Combine up to 2 lenses per side to teach color mixing (secondary colors). Overlap lenses without their durable plastic frames for kaleidoscope fun! Single lenses teach primary color identification or serve as great early science tools for observation. Wipes clean and includes color-mixing Guide. Grades PreK+