Just what is there to do on this great city of the plains? If you've already experienced "real" places like New York City or Boston or Chicago not that much. But if you happen to find yourself stuck in this former boomtown for a night or two here are some suggestions for things you some exciting activities.
Kansas City is known first and foremost for its tangy old style barbeque. Every region in the midwest has its own specific BBQ style and KC has been known to attract the likes of Jimmy Carter, Danny Glover, and Calvin Trillin for the spices served here. The restaurants to hit:
 Arthur Bryant's
There are only three Arthur Bryant's Locations, and one is in the KC-MO airport. If you can get there before dark head to the original, which is located at 1727 Brooklyn Avenue. Vegetarians beware: this is thick, hearty, authentic meat. Food is served on the plates I used to see at summer camp and portions are substantial. Get a beef or pork "sandwich" (a pile of meat with some white bread thrown on top) and some baked beans or fries if you're hungry, make sure to get a large drink. Notice those large urns full of spices and reddish liquid sitting on the front window sill? That's the unforgettable Arthur Bryant homemade bbq sauce in sweet or spicy.
 Jack's Stack
A bit more commercialized than Arthur Bryant's, but still delicious. This might be the best place to find authentic middle class Kansas City residents. Somewhat like the Olive Garden of middle america.
 Kansas City Market
Like the days of yesteryear, Kansas City remains a hub of husbandry and produce, bust observed by the famous city market that has been held saturdays and sundays in the same location since 1857. Vendors sell fresh, local produce from all over kansas and surrounding states, there are various artisans and such as well. Go in the morning if you want the freshest or widest variety, go after 10 or 11 to get deals on what the farmers want to get rid of before they have to drive home (in late august there were washington rainier cherries for $1 per pound, and limes for 10 cents each).