Trivia: In the original dozen family there was a girl named Mary Elizabeth Gilbreth. Mary along with some of her other siblings got diphtheria and she, at age 6, was the only one to die from it. The family never got over the loss of Mary and still referred to themselves as the dozen even though all 12 children were never contemporaries. This explains why very few references have Mary's passing in them including the Gilbreth books or even their papers.
Trivia: The scene where the twins dump the whole bag of dog food was completely improvised.