Physics Teaching Precision Optical Glass Prism 6 Inch-- Can Reflect Seven-Color Sunlight, A Good Toy for Your Kids This kind of optical glass prism can reflect seven-color sunlight It can be used to teach children to explore the mysteries of light, stimulate a child's thirst for knowledge Improve the children's interest of understanding the magic world Can be also a toy for kids Not suitable for children under 5 years. For use under adult supervision.