"A pet hamster is enticed by the family cat to venture outside his well-equipped cage to the sunroom only to very quickly discover life outside his cage is not the best for him."--

The Ham-Hams surprise one another with Valentine's Day gifts.

It is another busy day at the diner as Stanley cooks, prepares for a special event, and finally cleans up and goes home.

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.

"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"--

Feline Madame Wigglesworth is outraged when her privileged position in the house is usurped by a mere dog, Grub, so she comes up with a plan to expel the humans and put the pets, namely herself, in charge--but their human-free realm soon dissolves into complete chaos as she and Grub and his lovestruck sidekick Honeybaked Hamster struggle for the presidency.

"Og the Frog tells the story of how he first came to Room 26, where he meets Humphrey the hamster, befriends the students, and writes poems and songs"--

It's Halloween and Hot Rod Hamster is going to a party! But first, he must come up with a costume that's fun and spooky enough to win the contest.

"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"--

During their trail ride on all-terrain vehicles, Hot Rod Hamster and his friends stop to help Grandpa Dog and two puppies, whose vehicle has tipped over and gotten stuck in the mud.