Grandma Grouper's House is a location in Freddi Fish and the Case of the Missing Kelp Seeds.
Freddi goes here at the beginning of the game as she goes around the sea giving flowers to her friends. It is here that Freddi discovers that Grandma Grouper's kelp seed treasure chest had been stolen, so she promises Grandma Grouper that she will find the chest.
Later at the end of the game, Freddi and Luther return the chest to Grandma Grouper after spreading the seeds across the sea. As the last touch, Freddi and Luther plant some new kelp in Grandma Grouper's garden before they all head inside to talk about the kids' adventure.