The first book introduces the Banks family from Number Seventeen Cherry Tree Lane, London, consisting of Mr. and Mrs. Banks, their children Jane and Michael, and baby twins John and Barbara. When the children's nanny, Katie Nanna, storms out in a huff, Mary Poppins arrives at their home, complete with her travelling carpet bag, blown in by a very strong East wind. She accepts the job (agreeing to stay "till the wind changes"), and the children soon learn that their nanny, though stern, vain and usually cross, has a magical touch that makes her wonderful. Among the things Jane and Michael experience are a tea party on a ceiling with Mr. Wigg, a trip around the world with a compass, the purchase of gingerbread stars from the extremely old Mrs. Corry, a meeting with the Bird Woman, a birthday party at the zoo among the animals, and a Christmas shopping trip with a star named Maia from the Pleiades cluster of the Taurus constellation. In the end, in what is perhaps the most iconic image associated with Mary Poppins, she opens her umbrella and the West wind carries her away.