Used to live outside of Louisville for a while and really enjoyed my time there. Reports from friends that live up there say downtown had been a hot bed for protest in the past year and can be hit or miss because of it. Check with your hotel to ask what the current state of downtown before you go. As stated above 4th st live is a huge tourist trap. If you are staying on the east side and want to get away from the city checkout Shelbyville. If you have time the Buffalo Trace Distillery is in Frankfort (+-45 min out) and see if they are doing the hardhat tour.
Things to do.
Louisville Slugger Museum is a must.
Frazier History Museum you can kill a full day there
Kentucky Derby Museum at Churchill Downs and take one of the behind the scene tours they are worth it.
On Wednesday during the summer they do a free concerts on the river front.
https://wfpk.org/2021/waterfrontwednesday/
The Zoo is wonderful also
Unique kid friendly places to eat
Havana Rumba - Great Cuban food
Mike Linnig's - Give it a google quite a unique place on the river and worth the trip for the experience
Claudia Sanders Dinner House - Go there for the Sunday lunch buffet
Guaca Mole - Fancy Mexican
Adult places
Jack Fry's
Seviche
Jeff Ruby's
Ruth's Chris - Go for the view at sunset.
Brown Hotel and get a Hot Brown (the best is at the Bell House in Shelbyville)