We made this project with a vase filled with water and a couple of Cd's.the idea we had was to shine a light onto the CD to make the rainbow color reflect onto the others and would intensify the colors. WE then decided to add the vase with water into the mixture to kind of refract the light and bend it to different parts of the area around the whole project. When we added the water we noticed that the colors were not only reflecting onto the CDs and the roof, But it also had a disco ball effect and scattered the light/ colors around the room. There was even a hologram affect going on!