A demonstration of what happens when light travels through water or glass. Light travels and bounces off surfaces into our eyes. When light travels from air through water, glass or anything that lets light through, it gets bent. This bending is called refraction.
After watching the clip, children could be asked to investigate the real world applications of lenses (such as magnifying glasses or reading glasses). Alternatively children could create a maze inside a shoe box, and be challenged to reflect a beam of light, using mirrors, around the maze. This could be linked to Mathematics and children could be asked to measure the angles of the light as they are reflecting from the mirrors.