Here are a couple of watercolor roughs I did as demos for an "Intro to Illustration" class I'm teaching. I did these step by step, with the students suggesting the colors for each element, and I think they came out quite nicely.
I probably had animals on the brain because I'd just been to the zoo a few days earlier. It's tough doing location sketching there, since the critters are always on the move. Maybe I should concentrate on sleepy koalas next time.
Of course, you can always draw people instead. Here's feeding time at the giraffe house, or at least as much as I could fit in alongside the turkeys and polar bears.