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

Lola the hamster is teased by her classmates after they learn that Lola's parents call her "babycake," "sweetie pie," and "fairy princess."

Katie Carew wishes she could be anyone but herself, and turns into a hamster.

"Hamster Holmes solves mysteries with his sidekick, a firefly named Dr. Watt! Corny O'Squirrel is having trouble sleeping because someone keeps knocking on his door late at night. Can they find out who is knocking, and why?"--

When summer arrives, Humphrey, the pet hamster of Longfellow School's Room 26, is surprised and pleased to learn that he will be going to Camp Happy Hollow.

After the last bell, classroom pet hamster Turbo becomes Super Turbo to fight evil, but he soon finds that he isn't the only super pet in town when he is forced to face an evil rat named Whiskerface.

"Eleven-year old Sam befriends a hungry class hamster that undergoes a freaky transformation"--

When Humphrey the hamster returns to Mrs. Brisbane's class after the winter break, a new class pet and some other surprises give him an opportunity to reflect on the meaning of friendship.

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.

When Molly volunteers to look after Sammy McHamsterhead, the class pet, for the weekend she has visions of training him to do tricks and becoming rich and famous--but when she leaves the cage open and Sammy escapes she realizes that she has to find him or confess her carelessness to her teacher, Mr. Rose.