I also had always assumed that Little League was just local kids baseball, but it's a big organization that goes back to 1939. It has millions of members, its own official rules, rating system, World Series, board of directors, TV partners, and museum. It even has a federal charter in US law.[1] It's a bit alarming to discover that something you thought was casual turns out to be a giant organization.

[1] https://uscode.house.gov/view.xhtml?path=/prelim@title36/sub...