The movie about a family takes foster kids. One of the kids has a very deep voice and wants to earn a scout badge in the boy scouts/ He has a leg brace on one of his legs. I think the title has to do with Room for one more.

That is the correct title. Room for One More (1952) - Overview (http://www.tcm.com/tcmdb/title/88620/Room-for-One-More/)