A Wendy house, in the United Kingdom, is a children's playhouse that is large enough for one or more children to enter. Size and solidity can vary from a plastic kit to something resembling a real house in a child's size. Usually there is one room, a doorway with a window on each side, and little or no furniture other than what the children improvise.
The original was built for Wendy Darling in J. M. Barrie's play, Peter Pan, or The Boy Who Wouldn't Grow Up. Wendy was shot by the Lost Boy Tootles after arriving in Neverland, so Peter Pan and the Lost Boys built a small house around her where she had fallen. It was inspired by the wash-house behind Barrie's childhood home in Kirriemuir and first appeared in story form in The Little White Bird in which fairies build a house around Mamie Mannering—the prototype for Wendy—so protecting her from the cold.