Ah! Mary Poppins! One of my favorite movies. I always thought it was interesting the way it skewered the budding feminist mother who was ignoring her kids at the expense of her political activities and the career driven father who was doing the same to his kids for his work. It was wonderufl food for thought wrapped up in a very entertaining message.
BTW, I read somewhere that when the folks doing "Sound of Music" were casting, and were considering Julie Andrews, they saw "Mary Poppins" and signed her immediately!