The smallest boy in class learns an important lesson about size in this delightful tale that combines a boost in self-esteem and a math lesson. Charlie loves everything about school except lining up by size—he is always the smallest. One fall day, his teacher presents the class with three pumpkins: small, medium and large. They must predict how many seeds are in each, then do the messy but fun work of removing the seeds. For homework, they think of how they should count them all. One group counts by twos, one by fives and Charlie counts the smallest pumpkin’s seeds by tens. The final tally is a surprise to everyone, with a not-so-subtle message that “Small things can have a lot going on inside them.” A page of pumpkin facts will have readers wanting to grow their own pumpkins. Karas’s watercolors charmingly portray Mr. Tiffin’s busy class hard at work, but having fun learning. The children’s faces vividly express the wide range of reactions to pumpkin guts, as well as Charlie’s uncertainty about being the smallest. This will resound well with elementary-school teachers, who will find it useful for teaching prediction, skip counting and even beginning multiplication. *(Picture book. 4-8)*