The Brady Kids enter a Hot Air Balloon race at the local carnival. Several of their school friends are on another Balloon. But something goes wrong and the balloon takes the group to a strange, far-away island where they meet Marlon, a magical Mynah bird whose talents include ventriloquism and impersonations; and Ping and Pong, two pandas who speak only Chinese.

The Brady Kids and their newfound friends escape giant crabs and discover that Ping and Pong are two test pandas with an experimental rocket capsule. Then they meet Father Nature, who is charge of the weather because his wife Mother Nature is sick, as well as the Abominable Snowman who is unhappy because of the tropical island's heat. Marlon tricks Father Nature into creating snow on the island. To get back home, they decide to launch the pandas' rocket into the ocean and us it as a submarine to sail home.

Peter wishes he looked like the movie star Clint Flint. Marlon uses his magic to grant his wish but screws up and morphs Bobby's body into Flint's and vice versa.

Bobby is a fan of the Lone Ranger and orders a pin from his fan club. Marlon uses his magic to try to transform it into real silver but bring the Long Ranger's horse "Silver" to the tree house.

Cindy meets Clark Kent and gets him to talk about the city's "Paint-Up" week on TV to advertise for help. Clark and Lois Lane are also going participate. But the criminal scientist Wily Toulouse La Trick and his henchman Igor substitute delayed-action invisible paint so that when the bank is painted it will become invisible so they can rob it.