Crescent Moon is one of my favorite tangles. It was probably the first tangle I learned when I took a Zentangle class and very often a tangle I teach in my introductory Zentangle classes. It doesn't require lots of concentration and has a great playful look to it. It is the Diva's theme for her weekly challenge and my two entries are below. As I was copying the link to the challenge I just realized that it was supposed to be a monotangle. Oh well, I am posting anyway because Crescent Moon and tangleations of it are featured prominently in both tiles!