A glass prism is a transparent object having two triangular ends and three rectangular sides. The refraction of light in glass prism is different from a glass slab. This is because in glass prism, the incident ray of light is not parallel to emergent ray of light. This kind of optical glass can reflect seven-color sunlight .it can teach children to explore the mysteries of light, stimulate a child's thirst for knowledge, and improve the children's interest of understanding the magic world.