"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie onMay 7, 1951 with Clifton Webb reprising his film role.
Based on the real-life Gilbreth family. Daughter Mary died from a childhood illness; the movie includes a Mary but keeps her somewhat in the background with no lines.
In the movie, the last child born is a boy named "Robert". But in real life, the last Gilbreth child was a girl named "Jane". There was a son named Robert, but he was the second-to-last child born.
On the shelf in the living room is a picture of the real life Frank Gilbreth in uniform as an Army Major during WWI. This is visible outside the makeshift operating room during the mass tonsillectomies.
The big house the family moves to in Montclair is the same house set originally built for Judy Garland's family in Meet Me in St. Louis. Fox didn't have an appropriate standing outdoor set so they rented time on the "St. Louis Street" on MGM lot #2.
The drawing of the galaxy in the beach house is M-51, The Whirlpool Galaxy.