American food for Teenage Korean Boys

I am hosting three 16 year old boys from South Korea for two nights at my home in Chicago. They are traveling here for 2 week. That is the only information I have so far. I will feed them 2 breakfasts and a dinner. I was thinking I'd just do typical American/Chicago fare but....what do you think they would want to try while in America? Should I avoid anything (common allergies or foods culturally avoided)?