In addition to your complimentary Saturday pass to The City Museum, there are lots of other great places to visit in St. Louis:

Forest Park https://www.forestparkforever.org/

St. Louis Botanical Garden https://www.missouribotanicalgarden.org/

St. Louis Gateway Arch https://www.gatewayarch.com/

Contemporary Art Museum https://camstl.org/

St. Louis Science Center & Planetarium https://www.slsc.org/

St. Louis Zoo https://stlzoo.org/

St. Louis Art Museum https://www.slam.org/

Graffiti Wall https://racstl.org/public-art/the-mural-mile-floodwall/

Busch Stadium

Mississippi River boat tours

Fitz's Root Beer factory https://fitzsrootbeer.com/