Hi Wendy! I think he had the River Market in mind. http://www.kcrivermarket.com/ Of course the Hall's Crown Center is pretty close also but, I haven't been there in a while so I'm not really sure what shops are in it anymore. Maybe other's can chime in on this?
What's on the Plaza is the AoS store. I've been to it as well as the one on Union Square in SF. Not a big fan of AoS, but I'd be up for anything that would make for the greatest/happiest turn-out.