Certainly there are lots of other things happening in Louisville: Shakepeare in Central Park (Two Gentlemen of Verona one of my personal favorites!), movie theaters that will have free or dollar movies in the early am (and sure, you've seen them at home but how great it is to see it on the big screen?), museums always have something going on (and we have several to choose from) as well as several free concerts.
See, education doesn't take a vacation and it doesn't have to come with a fancy title to entice you to sign your kid up for it. Just takes a bit of imagination, time, and the inclination to get engaged. In our family each day is an adventure...today was Opera Day (singing instead of talking) and learning a bit about music, opera, drama, communication...it was great fun, but shhhhhh, don't tell the kids it was educational too.