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! The Squeak Scouts are taking their very first field trip to the attic, and Albert is determined to bring home something special for his souvenir collection. Luckily, the attic is full of mysterious surprises!Every Mouse Math title includes back matter activities that support and extend reading comprehension and math skills, plus free online activities.(Math Concept- Number Sequence)