Mead detailed the development of the self in a three-stage process: in the preparatory stage (0-3 years old), children have no sense of self, during the play stage (3 to 5 years old), the self emerges as children pretend to take the roles of specific people or significant others, and in the game stage (begins in the early school years; about 8 or 9 years old), children become concerned about and take into account in their behavior the generalized others which refer to the attitudes, viewpoints, demands and expectations of the society which include cultural norms and values we use as reference