These are fun and really quick to do. Plus, they are a good way to practice drawing. Let me know if you give it a whirl.
By the way, for those of you who have expressed an interest in the Ode to Nature class that I've been taking, Alisa Burke is having a sale on that class and all her previous classes. You can see the announcement here. I'm thinking about signing up for one of her sketchbook drawing classes but haven't decided for sure. The sale runs through Sept. 7.