The Plaza, Kansas City's downtown version of Rodeo Drive, is REALLY worth strolling. The city boasts they have more fountains than Rome, and it's not too hard to believe. It is safe, clean, has great restaurants, and wonderful shopping...at very affordable prices. KC is also know for blues and jazz, although we didn't really take advantage of it.
Westport is also a funky little "Haight/Ashbury"-type section of the city. Fun stores and lots of coffee shops, although crowded with young high-schoolers trying to "find their identities." Still worth a stroll if you're looking for some ethnic food!
Quick Tips:
I would stay clear of the business district in the downtown area. It's mostly conventioneers and pretty much shuts down on the weekend. Although there is a good mall and train station with an interesting museum, still you will want to stay and stroll the Plaza Area! Also, the houses around the Plaza area are AMAZING! Mission Hills neighborhood has mansions like I've never seen...and they probably don't even cost that much! Definitely a worthy drive!
Best Way To Get Around:
Parking garages are free, and the airport is rather far from the city, so it's best to rent a car if you drive! For around the city, however, walking is the easiest. There is also a little trolley tour that will pick you up and take you to various places in the city.