Neighbors bring food with death and flowers with sickness and little things in between. Boo was our neighbor. He gave us two soap dolls, a broken watch and chain, a pair of good-luck pennies, and our lives. But neighbors give in return. We never put back into the tree what we took out of it: we had given him nothing, and it made me sad.
I believe that Scout was saying this as the narrator, hence the more gramatically correct sentences. This was like Scouts final thoughts on Boo Radley and sort of recapped the entire story in a paragraph. It was a great book.