While the library that Sam and his adventurous friend Sarah live in is being renovated, the two mice try to make new homes for themselves in the attic, constructing everything from a yurt to a geodesic dome.
Claudia and Valentina find a key to a locked door in Claudia's dream house. Once they pass through the door an adventure into the past and future begins.
Pop-up pages and movable parts tell the story of Granny sleeping in the house with a child and animals sleeping on top of her, until the flea bites the mouse and starts a chain reaction of waking everyone up.
Looks at the design and construction of a variety of homes around the world, including dwellings made of clay, reeds, bamboo, wood, snow, stone, and hollow caves.