I saw this class by Alisa Burke the other day and was inspired to doodle a mandala of my own. There's just something about the repeated motions that are very relaxing - I'm seriously considering signing up for the class.
This is the first page in my Strathmore toned gray sketchbook - I'm really happy with how the black ink looks on the gray page. If I do sign up for that class (or even if I don't), I'm tempted to make this sketchbook mandalas-only... themed sketchbooks are fun!
