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

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

After learning about Sherlock Holmes, Humphrey the classroom hamster follows clues to try and discover why Mrs. Brisbane is gone and Mr. E, a fun but not very educational substitute, is taking her place in Room 26 at Longfellow School.

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.

While continuing to help his classmates solve their problems, Humphrey, pet hamster of Longfellow School's Room 26, faces many surprises, like rolling in a hamster ball, a substitute janitor who might be an alien, and the possibility of Mrs. Brisbane retiring.

Humphrey, the pet hamster of Longfelow School's Room 26, learns that his classroom is full of secrets, the most important of which is that a student will be leaving soon.

"To Humphrey and the students at Longfellow School, spring seems impossibly late this year. Fortunately, planning a school Family Fun Night keeps the students (and classroom pets) busy as they look for signs of the changing seasons"--

Og loves the kids in Room 26, but he's awfully curious about the human world outside his tank! His friend Humphrey has no problem getting out and about, but it's harder for Og because he can't climb the way a hamster can. But Og never let hard work or fear stop him from going after what he wants. And he's determined to help the tads in Room 26 understand that taking risks can pay off -- especially when they are being true to themselves. Whether it's...

"Humphrey goes on a backyard camping adventure with his classmates and meets all kinds of outdoor creatures--even some scary ones"--

Roo is unhappy with his messy room and becomes more organized with the help of Pooh, Piglet, and Tigger.