Humphrey, pet hamster at Longfellow School, learns that he has an important role to play in helping his classmates and teacher.

Humphrey, the pet hamster of Longfellow School's Room 26, relates the ups and downs experienced by his human classmates as they begin a project to create a model town complete with houses and community services.

Humphrey the classroom hamster has adventures going to the library, learning about the ocean, and sailing across a pond on a sailboat.

After an unsqueakably fun summer at camp, Humphrey can't wait to get back to Room 26 and see his classmates. But something fur-raising happens on the first day of school -- some kids he's never seen before come into Mrs. Brisbane's room. While Humphrey gets to know the students, he wonders about his old friends. Where could they be? It's a big mystery for a small hamster to solve.

Humphrey the hamster and the students in Mrs. Brisbane's class get ready for the holidays and a special Winter Wonderland program.

During a creative writing unit at Longfellow School, the students in Mrs. Brisbane's class practice using their imagination with their very own writing journals--and Humphrey finds out that writing from his imagination is harder than it looks.