Bath stuff or spa stuff is great for gifting (especially stocking stuffers!) and selling at craft fairs. Here are a few of my favorite free crochet bath patterns!
I love this design! The elastic keeps the towel wrapped on top of your head. Since there are so many colors of cotton nowadays you could make one in virtually any color.
This page also links to a pattern for a pampering massage soap saver that matches this washcloth and back scrubber. So technically you have three free patterns in one! You could make a whole set to put in a spa gift basket.