Nick Danger in the Case of the Missing Yolk.

The Yolks, a poor hillbilly family, are transported to a high-tech, futuristic home with all the latest gadgets, doo-dads and labor-saving devices. They soon begin to realize that their old life may not have been so bad after all, especially when their son gets mixed up with a TV star and the family hires a strange private investigator to find him.