Mary Poppins will be flying into Miami's Adrienne Arsht Center from January 1 through January 6 to delight audiences. But just who is this magical nanny? She has touched children’s hearts ever since P.L. Travers’ classic books were first published in 1934, but few have been able to define what makes her special. In this clip below, famed producer Cameron Mackintosh, Disney Theatrical Group president Thomas Schumacher and actresses who have played Mary in the past discuss her qualities and what makes the character so timeless.