Beloved character Flat Stanley is back with a whole new set of friends in this STEM-focused chapter book series. In the third book, Stanley must calculate the perfect number of treats to bring to Classroom 2E's hundredth day of school celebration. Ever since Stanley Lambchop was flattened by a bulletin board, each day brings new adventures It's the hundredth day of school, and the second graders in Classroom 2E will each be bringing...