Colour Changing CDs - Chameleon CDs

Show a compact disc and put it inside a case witch a hole in its center. Take a red ribbon and pass it through the hole and... incredibly the CD turns red! The effect is repeated two more times with the other two CDs and other coloured ribbons…. changing them into different colours, each time showing the audience both sides of the discs after they change.
• The discs used are real CDs.
• At the beginning and at the end of the routine, the case can be shown to be empty.