There are many ways to recycle the fans from unwanted electronics. Here’s one way our class gave new life to a supply of dusty fans. Simply break off 3 blades: the blades must be consecutive to create the wobble.  After removing the stickers from the fans (this would help the hot glue hold better), we attached a 9volt battery and a battery cap. We attached our wires to the correct leads from the fan and wrapped them in heat shrink.  A small alligator clip was attached to the positive lead to create a handy on/off connector.