Is it safe to say most of us have (or can easily get our hands on) lots and lots of old unwanted CD's? If so, and you want to reach even further back in music to the disco era, here's a way to turn CD's into disco balls:
By cutting the CD's into small squares and fixing them to a spherical object, you can have a disco ball of your very own for dancing or decor. See a full how-to at wikiHow.
Image: You Make Me Feel Like Dancing: Disco Ball Decor