If you were to arrive early you could do first Fridays. That is where the art galleries open on Friday night in the crossroads district and people flock to see what's going on. I even saw 2 Delorians on the same night one Friday.
On the 6th at 2 pm Jim Riggs in concert at the Music Hall. Jim Riggs plays Theater Organs. I've seen him in concert and it was fascinating. He even brought an old silent movie and played along as they used to. The Music Hall is an art deco building 1 block from the Mariot.
If you've never been to KC I would suggest the WW1 Memorial and museum, newly remodeled and fascinating.
What kind of thing are you interested in?