I saw this pattern (non-ravelry link) at ravelry (ravelry link) some time back and knew I had to crochet it. It is fun, cute and quick! And a pretty way to dress up my daughters now-growing locks.
For my first kerchief I used some leftover worsted cotton and 5 mm hook. The pattern is nicely written and modifiable to any gauge and head size. My daughter is very pleased with it. I might make another one for her with finer yarn.