Science experiment - exploring optical property, Early physics Science educational toy for kids children student IncludedA pair of eyeglasses frame, 6 lenses (2 lenses for red, yellow and blue lenses), and 2 concave lenses for simulating vision of The color matching results between the three primary colorscombine the lenses of different colors randomly through holes of the frame Kindergarten student pupil Teaching Aidsthe fun of the lenses become a new color and learning science knowledge kid science development toys, a series of physical science boarden kids and children , stimulating their curiosity MaterialPlastic ColorMulticolored Eyeglasses frame width approx 13.5cm/ 5.31 inch Package Includes: 1 Set Kid Trichromatic Glasses Toy Note: Please allow 1-3mm error due to manual measurement, make sure that you do not mind before you bid. Due to the different monitor and light effect, the actual color may be slightly different from the picture color.