You might remember the Bic Daisy Vase I posted few weeks ago. This is an other use of the Bic pen. My only concern is that it's not exactly recycling since all these pens are new, but if you like to keep your old Bic pens, this is another interesting project.
If you kept around 300 of these pens, this is an even bigger project:
|The Volivik chandelier|