Taking a turn caring for the class pet hamster, Marion is devastated when the hamster goes missing and she receives an anonymous letter in her locker with clues leading to a mysterious scavenger hunt.

While her friends in the Critter Club babysit frogs, second-grader Marion enters a fashion design contest.

Learning that a nearby park is about to be turned into a shopping center, Amy races against time to save the recreation center and the animal friends who live there.

Liz is excited for her sleepover at the museum until she hears some spooky noises that may turn this sleepover into a nightmare.

When Ellie joins a softball team, she quickly realizes that the sport is harder than it looks! Is she meant only for the stage, not the field? And what happens when Ellie goes searching in the woods near the field for a stray ball and finds an injured baby deer?!

When a broken ankle forces Marion to withdraw from the horse show, she finds a way to stay active by helping her friends at the Critter Club animal shelter find homes for a litter of kittens.

When Marion and the other members of the Critter Club plan a ski weekend, they meet a snow bunny on the slopes, but Marion's kitten, Ollie, scares the bunny away.

"When Amy meets the owner of a brand-new puppy at her mom's vet clinic, she agrees to help the woman train her new pet. Amy does such a great job, she starts getting calls from more puppy owners! Things go great for a while, but soon, Amy is in way over her head. She can't say no to a puppy in need and has taken on way too many clients! Amy barely has time for school or her friends in between all the puppies. Can she dig herself out of this hole before...

Amy so looks forward to meeting her future stepsister, Chloe, that she is not prepared when Chloe first ignores her than is downright mean.

Marion volunteers at the Santa Vista Arboretum butterfly release and helps her younger sister Gabby overcome her fear of bugs so she can also attend the event.