There are many humorous sections in chapter two.
First, it is funny to hear Scout's blanket statements about people. For instance, when Miss Caroline introduced herself as from Winston county in North Alabama, Scout completely judged her. Moreover, what makes things funnier is that Scout speaks with so much conviction. Here is a quote that shows this:
North Alabama was full of Liquor Interests, Big Mules, steel companies, Republicans, professors, and other persons of no background.
Second, the interaction between Miss Caroline and Scout is also very humorous, because Scout says to her that no one taught her to read, definitely not Atticus. In other words, Scout says that she was born reading. This is very innocent. Here is a quote that shows this:
“Teach me?” I said in surprise. “He hasn’t taught me anything, Miss Caroline. Atticus ain’t got time to teach me anything,” I added, when Miss Caroline smiled and shook her head. “Why, he’s so tired at night he just sits in the livingroom and reads.”
Finally, Scout completely misunderstands what the Dewey Decimal System is. She think is it something that Miss Caroline does by holding up cards with words on them and swinging them around. Scout shows that she completely misunderstands what is going on.