The Great Art Caper by Victoria Jamieson

When mischievous mouse Harriet and her gang of unruly rodents plot to pilfer second-grader Carina's entry for the school art show, the little girl's classroom pets - GW the hamster, Sunflower the guinea pig, and Barry the bunny - must work together to save the show.  A graphic novel that's just right for the readers 6+.