This is a very detailed question, so I will give as much detail as possible. All quotes are from chapter 26.
BOO RADLEY GAMES
When Scout thinks back to the games they played as children, she regrets her behavior and feels ashamed.
“I sometimes felt a twinge of remorse, when passing by the old place, at ever having taken part in what must have been sheer torment to Arthur Radley …”
However she also realizes, now that she’s older, that Boo was reaching out to them and might have felt a connection to them by leaving presents for them in the tree.