In honor of Mary Poppins‘ 61st anniversary, enjoy these supercalifragilisticexpialidocious facts about Walt Disney’s 1964 classic starring Julie Andrews and Dick Van Dyke. Are you ready for a supercalifragilisticexpialidocious trip down memory lane? Because even though the sound of it is something quite atrocious, Mary Poppins is marking its 61st anniversary Aug. 27. (Though, sorry,…