The series follows a trio of classroom pets—Linny the Guinea Pig, Turtle Tuck, and Ming-Ming Duckling—who use teamwork to help animals in need.

The series started out with two animated shorts called "Linny the Guinea Pig", which acted as pilot episodes.

[7] For the full-length series, the characters of Tuck and Ming-Ming were added to form a team of hero pets.

The classroom is always decorated with student artwork and other items related to a given episode's particular storyline, featured animal, or geographic location.

They make a quick joke and jump back into the box, emerging again wearing superhero capes.

Suddenly, the Wonder Pets remember how they solved the problem in the classroom and realize that the rescue has a similar solution.

A musical riff relating to the episode's rescue is played as Linny takes a bite out of the celery in her cage and winks at the camera.

Other pets have winked at the camera including Tuck in Save the Rhino, Ming-Ming in Back to Kalamazoo and "In The Land of Oz!"

started, Little Airplane had only produced live-action works, like Oobi and a short film titled The Time-Out Chair.

[14] After Oobi became a breakout success for the studio, its co-founder Josh Selig expressed interest in producing another television show.

The shorts focused on a silent guinea pig who left her classroom to go on fantastic adventures, each set to classical music.

[16] Josh Selig and Jennifer Oxley first screened the shorts at the wrap party for Oobi's second season.

Tuck and Ming-Ming were added to the cast to form a team of superhero pets, and the characters were given voices; the dialogue-free nature of the original shorts did not translate well to half-hour episodes.

[14] Many former crew members of Oobi moved onto the show, including writers Chris Nee and Sascha Paladino and composers Larry Hochman and Jeffrey Lesser.

Jennifer Oxley considers this technique her own invention and first used it to create lifelike transitions for Little Airplane's previous works.

Pam Gelman of Common Sense Media gave the show four stars out of five, describing as "kid-friendly mini-operas about teamwork and more.

"[33] Wonder Pets: In The City also got nominated for an Annie Award for Best Animated Television Production for Preschool, for the episode: "Save Tate?

"[34] Source:[45] In addition to the DVDs and books, the show's self-titled track, Wonder Pets!, was released on April 10, 2007.