a major theme in to kill a mockingbird is the journey from youth and innocence to maturity and knowledge how does Jem symbolized this theme and chapter 12?

This is the chapter that Jem begins to notice things that young boys never pay attention to........ he wants Scout to act like a girl, he's interested in Cal's life and how she became the woman she is, he places money his father has given him in the offering............ none the less, he's also a moody, hormonal young man.