<p>By P.L. Travers, the author featured in the movie <i>Saving Mr. Banks</i>.</p><p>From the moment Mary Poppins arrives at Number Seventeen Cherry-Tree Lane, everyday life at the Banks house is forever changed.<br />    It all starts when Mary Poppins is blown by the east wind onto the doorstep of the Banks house. She becomes a <i>most</i> unusual nanny to Jane, Michael, and the twins. Who else but Mary Poppins can slide<i> up</i> banisters, pull an entire armchair out of an empty carpetbag, and make a dose of medicine taste like delicious lime-juice cordial? A day with Mary Poppins is a day of magic and make-believe come to life!</p>