Yours, Mine and Ours (1968)

When a widower with 10 children marries a widow with 8, can the 20 of them ever come together as one big happy family? From finding a house big enough for all of them to learning to make 18 school lunches to coping with a son going off to war and an unexpected new addition to the family, this film attempts to blend two families into one and hopes to answer the question is bigger really better?