Talking points

Racism and Civilized Society-
Huck breaks the rules and doesn't want to be civilized for more reasons than just not taking baths. He breaks them because he doesn't like society's rules. He thinks justice is flawed. Terrible crimes go on day by day while the people worry about drunkedness and civility. Huck also scams because he has a different perspective of what is right and wrong. He learns that lies can be helpful depending on their purpose (eg: the slave unters and small pox scandal). This creates a moral ambiguity in him where he believes that he can do whatever he wants. He ends up entertaining the ideas of Jim's superstition as an alternate set of "codes". He at first laughs at them, but later realizes their wisdom sees the world in a different light.

The mississippi isn't free-
It exchanges one bad situation from another. Jim's salvation up north and Huck's escape from civilization both seem to always fail in one sense or another. Just as they get close to going up through the Ohio River into the North, a large fog overcomes them and gets them lost down the the mississippi, going deeper south. They also view the raft as a freedom from judgement, a place more vast and open and freeing than any place on land could ever be. This is because the world is theirs on the raft and they can change it at their will. It gives them both control over something even though they are kind of helpless.

Hypocritical Youth
Both Jim and Huck have a sense of youth to them that makes the entire book more exciting and entertaining. Huck is constantly creating stories, playing pranks and overall being ridiculous (he probably learned this from Tom Sawyer). He also is often seen in the story making better decisions than the adults and outsmarting them. This also explains why Huck has such an ego, because he views that he can outsmart society and get away with anything. Jim also characterizes a child in the story for three reasons. First he is on the run and at any point could be put in a situation that compromises him and puts him back into slavery. Second, he is very superstitious and not very intelligent, which makes the reader look at Jim very differently. Third, he puts himself under Huck in importance. He is always cautious while with Huck and doesn't question Huck's decisions because at any point Huck could turn him in. (This never crosses Huck's mind). Jim is also the only real and responsible adult in Huck's life. His wisdom and care actually changes Huck as a person.