The first book, "Mary Poppins," was adapted into a famous Disney film in 1964, starring Julie Andrews as Mary Poppins and Dick Van Dyke as Bert. The story follows the Banks family, who live in London, and their encounters with the enigmatic and magical Mary Poppins.

Mary Poppins is known for her distinctive appearance, including her prim and proper attire, umbrella, and carpet bag, from which she pulls out various surprising items. She possesses magical abilities that enable her to fly with her umbrella, communicate with animals, and take the children on extraordinary adventures. Throughout her stories, Mary Poppins teaches valuable lessons to the children in her care while also inspiring wonder and imagination.

The character has remained a cultural icon, with adaptations in various forms including stage musicals, additional films, and television adaptations. Mary Poppins represents the idea of magic, whimsy, and the power of imagination, making her a timeless figure in children's literature and popular culture.