Mary Poppins comes back on the end of a kite string, stays with the Banks family for a while, and then disappears on a merry-go-round horse.

Who else but Mary Poppins can lead the Banks children--Jane, Michael, and the twins--on such extraordinary adventures? Together they all meet the Goosegirl and the Swineherd, argue with talking cats on a distant planet, make the acquaintance of the folks who live under the dandelions, and celebrate a birthday by dancing with their own shadow.