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!

What could be better than a Captain Slime penny? Albert needs two quarters to use the library's new penny-smashing machine. Luckily, Wanda has a great idea for how Albert can earn the money. Every Mouse Math title includes back matter activities that support and extend reading comprehension and math skills, plus free online activities. (Math concept: Counting money)