Their CR is going to be a good thing for House. He's so used to being right...ish, and having to come to terms with the fact the universe as a whole doesn't work the way he thinks it should is going to be really interesting to play with. Especially when the information is coming from a kid :D

Actually, the fact Aang is a kid is part of why House would keep talking to him. House would write off an adult as an idiot and not worth his time. Kids are more open and honest and naïve (in his opinion) and besides, he actually kind of likes kids. Just don't ask him to admit it.

I'm trying to think of a way to keep them talking. House isn't the type to seek out social interactions, but otoh he does enjoy a good discussion. I can't think of anything specific atm but it'll probably be a reaction to something that happens. Hell, he might contact Aang after the worms and ask him how man-eating worms fit into his idea of a universe in balance ;p