Pattern: I used this tutorial on about.com as a guide to do single crochet around an elastic hair band.
Yarn: Patons Allure in Black
This is super quick and fun! With the novelty yarn I found that one time around with the stitches scrunched really close together was enough. I have also made these with Moda Dea Zing and it was really cute! It's a great use for all the novelty yarn you have lying around and it uses just a small amount of yarn.