https://www.littleleague.org/downloads/sandlot-fun-days-guide

Come together and play.
A player-led, unstructured opportunity for local Little League® programs to provide a fun, relaxed, activity for baseball and softball players, where kids make the rules, make the lineups, and make the calls.

Check out these guidelines, tips, and rules for your local league to organize a Little League Sandlot Fun Days event in your community.