When a little boy finally decides what to bring to the celebration of the one hundredth day of school, he has no idea what a surprise it will be for everyone.

In their fourth adventure, classroom mice Fergus and Zeke--after a few false starts--jump into a creative project to help the kids mark the one hundredth day of school. Fergus and Zeke love being the class pets in Miss Maxwell's classroom, and they do everything the students do. But when the kids start collecting items and doing gym challenges and making projects to celebrate the one hundredth day of school, the mice can't seem to find a way to join...