Each read-aloud book in the Mouse Math series focuses on a single, basic math concept and features adorable mice, Albert and Wanda, who live in a People House. Entertaining fiction stories capture kids’ imaginations as the mice learn about numbers, shapes, sizes and more. Over 3 million copies sold worldwide! Wanda's big show is tomorrow. Rehearsals are going well, but what should the Nibblettes wear? When a costume disaster strikes, it's Albert to the rescue!Every Mouse Math title includes back matter activities that support and extend reading comprehension and math skills, plus free online activities. (Math concept: Patterns)