A tree with a secret bark-crack entrance; inside is 100 times bigger than the tree, with 50 floors. Inspired by the Magic Tree House.
A ten-floor treehouse the Sonic Hedgehog Girl built inside a giant underground cave, reached by a loopy-loop slide behind a pile of rocks.
A family homestead in a Maine forest where each sibling age 8+ has their own cabin, plus a two-story shared play cabin with a gymnastics course.
A large mansion on 30–40 acres at the northern tip of Alaska, home to the four sisters and their mother; the family found a gold mine on the property.
Isla's eight-floor NYC mansion where rescued cats roam freely, with a kitty obstacle course, a cat library, and the invented Cat Bot.
Silver's family's large Seattle apartment — 8 bedrooms and a 4DX-style theater room, rented for only $4/month.
A giant underground cave stretching for miles, reached via a trapdoor in the former orphanage; headquarters of The Animals spy crew.
Where Cy lives with Celsily, on a central California farm. Has farm animals.
A large forest in Maine owned by the girl with the hair wall, enclosed by a wall of her orange hair to keep out lumberjacks.
Age 19. A forest-dwelling girl with vivid orange, prehensile hair that she grows into a protective wall around her woods to stop lumberjacks.