Prior to the update, Sims can only grow as far as the pre-teen life stage.
The life stage is featured in The Sims FreePlay with the Teenagers update, in which pre-teens can grow up to the teen life stage by completing a certain quest. Players can download custom head and body skins which can give a Sim the appearance of being a teen. The teen life stage is not present in The Sims, as Sims in this game do not age.
Teens are not included in the console games based on The Sims 2, The Sims Bustin' Out, and The Sims Medieval. It succeeds the child life stage and precedes the young adult or adult life stage. Teen, or teenager, is the fourth life stage of a Sim in The Sims 2, The Sims Stories, The Sims 3, and The Sims 4.
