https://www.littleleague.org/play-little-league/determine-league-age/

The T-Ball Division includes players who are league ages 4 to 6 who are new to softball. This is an instructional division which includes fundamentals of the game such as hitting, fielding, throwing, catching, and baserunning. We will also teach the players about being great teammates and having a fun time. The players will hit off a tee for the majority of the season and we will incorporate some coach pitching as the season progresses.

Note: If your player is League Age 6 and has no previous playing experience, we would recommend registering them for T-Ball. If they have at least 1 year of T-Ball experience and would like to play in the Minor B division, the league will discuss your players eligibility to play in Minor B with the registered parents.

The Minor B Division in Illinois District 13 is comprised of league ages 6 to 8. This is an instructional division which includes a mix of coach pitch and tee hitting and will focus on the fundamentals of the game. This division does not keep score during the games and the emphasis is on fun and learning. Please reference the age chart in the link at the top of this registration page to help determine registration eligibility for your player since there could be overlap between divisions. Recommended for first-time 8 & 9yo players

The Minor A Division is an instructional division for League Ages 9 to 10 years of age. Please reference the age chart in the link at the top of this registration page to help determine registration eligibility for your player since there could be overlap between divisions. Competition This level will consist of Player/Coach pitch for the first half of the season and Player pitch only for the second half of the season. This Division does keep score during the games and standings are kept. Recommended that 8-year-old players have at least one year of experience in Minor First-time or less experienced 11-year-old players may participate with league approval

The Majors Division is comprised of players of league age 10 to 12 who are experienced softball players looking for a competitive level of play.  Competition This level will consist of player pitch the entire season and does keep score during the games. Recommended that 10-year-old players who have never played or only played one season of Minor A participate in Minor A.

The Junior League Softball division is a program for players league ages 12-15, and uses a conventional 60-foot diamond with a 43 foot pitching distance. A local league may dual-roster 12-year-olds, assessed capable, to a Major and a Junior division softball teams. 

The local league has an option to choose a Tournament Team (or "All Stars") of league age 12-14-year-olds from within this division (and/or from within the Girls Senior League Softball Division), and the team may enter the International Tournament. The culmination of the International Tournament is the Junior League Softball World Series, featuring teams from around the globe. All expenses for the teams advancing to the World Series (travel, meals and housing) are paid by Little League International.