Grandpa takes his grandsons into the swamp for what they thought was a fishing trip, but Grandpa had other plans. He takes them to a magical Island hidden deep in the swamp called Rainbow Island. There they meet many strange and exciting, new creatures like Snork the Schnozzel and are introduced to the land of the farting Stinkles and the multi-eyes Blinkles. The boys could never have imagined in their wildest dreams that such places and creatures could possible exist. They couldnt wait to bring their sisters with them tomorrow for another adventure with Grandpa.