On a class visit to the aquarium, Miss Whimsy's fifteen students search for a missing mermaid.

While visiting the art museum with their teacher, Edward "Egg" Garrison and his friends realize that one of the paintings is a copy and try to investigate what happened to the original.

While visiting Scrub Brush, a frontier town, with their teacher, Edward "Egg" Garrison and his friends are told that someone is stealing the ticket money which could force the village to close and they set out to find the culprit.

In Washington, D.C., on a field trip, "Egg" Garrison and his friends solve a haunting mystery.

On a science class trip to a local cave, Edward "Egg" Garrison and his friends are confronted by the mystery of a faked cave-in.

On a science class trip to the aquarium, Catalina "Cat" Duran and her friends discover that two of the seals have been drugged and investigate to discover the person responsible.

While their sixth-grade class is on a field trip to Everglades National Park, James "Gum" Shoo and his friends find a suspicious park ranger and a gang of poarchers.

When Catalina "Cat" Duran and her friends in the History Club arrive at Mount Rushmore on a school trip they find that someone is playing dangerous tricks and trying to drive people away from the park.

Edward "Egg" Garrison and his friends are on a field trip to watch the local minor league baseball team, but a theft at the concession stand is delaying the game, so the four sixth-grade detectives decide to investigate.