Humphrey the Hamster is a fictional character from the children's book series written by Betty Birney. He is a curious and adventurous little hamster who lives in a classroom and often finds himself in various entertaining situations. The stories highlight his interactions with the students and his observations of their lives. The series emphasizes themes of friendship, problem-solving, and the importance of understanding different perspectives. Humphrey's adventures encourage young readers to explore their own creativity and imagination while learning valuable life lessons. The character has become popular among children and is often used in educational settings to promote reading.