Signs of spring are very exciting to everyone at Longfellow School. Mrs. Brisbane's class has seen flowers poking out of snow and baby birds hatching, and Just-Joey even brought in tadpoles that are growing into frogs. It also means Family Fun Night is coming up, and all of the students' families are involved in making amazing activities. Humphrey helps in many ways, of course, but he can't stop wondering about his own family. He doesn't know anything about his mom or dad. Luckily, all of his wonderful friends help him see that families come in many shapes and sizes, and Humphrey's might be the biggest (and best!) one of all.