Tommy and Annika are fascinated by their new neighbor, an unusual little girl who lives all alone with her horse and monkey, performs her own act at the circus, bakes cookies on the floor, and is stronger than anyone in the world.
The adventures of the strongest girl in the world, who takes her two friends with her when she travels from Sweden to visit her father, king of an island in the South Seas.
Ronia, who lives with her father and his band of robbers in a castle in the woods, causes trouble when she befriends the son of a rival robber chieftain.
The noisy children of three neighboring families have a gay time at Christmas baking cookies, cutting and decorating trees, eating fruitcake and tarts, and opening Christmas gifts.