This is a really quick and easy way to cover a pen that can be quite striking in the right colors. It's also a good way to use up any strings you have left laying around from your last filligree project. You can find out more about covering pens in this blog post and more about extruding polymer clay strings in this one.
1 Bic Round Stic pen or similar
Several colors of clay strings (about 6-7 feet altogether)
Extruder (unless you've already made your strings)
Sharp craft knife (a tissue blade will work but I prefer my X-acto knife for more precision)
Extrude your clay (if you haven't already). I'm using strings leftover from a filigree project. You won't need near this much, it's just my leftovers.
This is only the beginning of the tutorial, but if you want to see how this multicolored polymer clay spaghetti turns into a pretty pen go to http://www.kaelmijoy.blogspot.com/2012/01/polymer-clay-tutorial-striped-pen.html. You'll find plenty of other interesting and fun tutorials on this blog as well!
Kael Mijoy can also be found online on Flickr, Twitter, http://www.kaelmijoy.blogspot.com/, and her ArtFire shop.