What is one major event that happened in To Kill a Mockingbird from Scout's perspective?

Throughout the course of the novel, Scout's perception of Boo Radley changes, which contributes to some of the major themes of the novel. 

In the beginning of the novel, Boo Radley's character emphasizes Scout's childlike ways and innocence - in fact, the kids describe him as a giant man who eats raw animals. As the novel progresses, however, they grow closer to Boo Radley . . . from a distance. He leaves Scout and Jem presents and even mends Jem's pants. 

At the end of the novel, however, one event solidifies Scout's perception of Boo Radley, completing her transformation from an innocent child to a young lady that understands the differences between appearance and reality. After the trial in which Tom Robinson was convicted, Bob Ewell attacked Scout and Jem while they were walking home from the Halloween pageant. While the official story was that Ewell fell on his own knife, Tate insinuated that Boo Radley stabbed Ewell in order to protect Scout and Jem. 

Due to her costume, Scout couldn't see her assailant well, but she did see that a tall, unshaven man carried Jem home. When that same man was in her living room, it took her awhile to recognize him as Boo Radley. Instead of charging Boo Radley, Tate decided to "Let the dead bury the dead" - Tom Robinson was wrongly convicted and now the man responsible for his conviction was also dead. 

After Scout walked Boo Radley home, Atticus reads Scout a story before bed. Scout describes Boo Radley as "nice," and Atticus responds by saying, "Most people are, Scout, when you finally see them." 

It's at this moment that she realizes that Boo Radley - who she previously viewed as evil - is actually capable of good deeds. He becomes a real person to her, which pushes her to a more adult reality.