According to george herbert mead, at what age do people start to learn how to take on multiple roles through team sports and organized play?

According to George Herbert Mead, the age that people, particularly children, start to learn how to take on multiple roles through team sports and organized play is at 3. This stage is called the play stage, this is when the children interact with each other and sometimes pretend to be someone else, like a teacher, police, etc.