In London, 1910, George Banks returns home at Cherry Tree Lane to learn from his wife, Winifred, that Katie Nanna has left their service after their children, Jane and Michael, have run away, “For the fourth time this week.They are returned shortly after by Constable Jones, who reveals the children were chasing after a lost kite. The children ask their father to help them build a better kite, but he dismisses them. Taking it upon himself to hire a new nanny, Mr. Banks advertises for a stern, no-nonsense nanny. To contrast, Jane and Michael present their own advertisement for a kinder, sweeter nanny. Winifred tries to keep the peace. Mr. Banks rips up the letter and throws the scraps in the fireplace, but a strong wind draws the fragments up through the chimney and into the air.
The next day, a number of elderly, sour-faced nannies wait outside the Banks’ home, but a strong gust of wind blows them away. Jane and Michael then witness a young nanny descending from the sky using her umbrella. Presenting herself to Mr. Banks, Mary Poppins .calmly produces the children’s restored advertisement and agrees with its requests but promises the astonished banker she will be firm with his children. As Mr. Banks puzzles over the advertisement’s return, Mary Poppins hires herself, and she convinces him it was originally his idea. She meets the children and helps them magically tidy their nursery by snapping her fingers, before heading out for a walk in the park .