To Kill A Mocking Bird Chapters 4, 5, 6

In Chapter 4, Scout discovers a knothole in one of the Radley's oak trees, and in it was a couple of pieces of chewing gum. And of course her first actions is to eat the two pieces of gum with Jem. I find this  vivid example how old Scout is. Only a child would immediately eat something she randomly found because she thought it would taste good. Also in that chapter, Scout and Jem find two old Indian headed pennies and decide o keep them for themselves. Which is another example of their age because I consider an action like that "steeling". Because if they were older, perhaps they would stop and think that those coins might be more significant to someone else, and may not just take them because they are cool and shiny. Who's even putting pennies in a knothole? What's the point? They are worth next to nothing so why go through the trouble of hiding them and why go through the effort of taking them? They are practically worthless.