9 years & up. Introduce your children to the science of light and color. Children will be amazed as they scatter rainbows all over the classroom. This prism is perfect for an interactive discussion about light, color, and refraction! Refraction is the bending of light as it passes from one medium to another medium with a different density. This phenomenon occurs because light travels at different speeds in different materials. Encourage your children to ask questions about the science concepts they are unfamiliar with. Made of a durable acrylic material. Measures 4" tall.