Step-by-step tutorial
Step 1
To get started, cut paper in fun shapes or designs. This will add a cool effect to the rainbow reflections on the wall by blocking out light where they are placed. Tape the paper shapes to the CD.With St. Patrick's Day in mind, we decided to create a shamrock pattern on the CD. An easy way to do this is to use a craft punch to create paper hearts, which then can be arranged in three's, creating mini shamrocks.
Final result!
Find a dark room with white walls. (You can also tape a piece of plain white paper about 6 inches from the floor.) Place the CD on the floor a couple inches away from the wall and shine light onto the CD with a flashlight. What do you see? Try changing the distance between the CD and the wall. What happens? Try changing the distance between the flashlight and the CD. What happens now?