When a dog gets too close to Humphrey at the town pet show, Og the Frog saves the day and Humphrey sees that having a great friend is the best prize he could possibly win.

A boy's hamster leads an increasingly large group of hamsters on a tour of the boy's house, while his father counts down the minutes to bedtime.

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.

When Harry, the class pet, gets out while at Amelia Bedelia's school break, Amelia and her friends must find him.

"Henry is desperate for a little peace and quiet from his extremely chatty roommate Marvin, and after Henry finally loses his cool, these hamsters must find ways to compromise and live together"--

"Humphrey is spending the weekend at Garth's house when the prize for his scavenger hunt is stolen from its hiding place in Humphrey's cage."--

Sam's favorite thing about second grade is the class pet, a hamster named George Washington, so when the class goes on a field trip to a science museum, Sam cannot resist bringing George along.

"When Mandy, one of the students from classroom 26, brings a special hamster-sized racecar to class, it means just one thing--Humphrey is going to be in a hamster race"--

Stanley is excited about bringing the class pet, a bird, home for the weekend, but when his friend Larry urges him to open the cage and let Figgy out to fly, it is hard to know who is to blame for the ensuing disaster.