According to Erikson's psychosocial stages of development, the brother who would classify as being in the initiative vs. guilt stage it would be Mike.
During the initiative vs. guilt stage, children aged 3-5 begin to develop games and social interactions that encourage a sense of leadership, initiative and decision-making.
Mike demonstrated that he was at this stage by inventing new things to do and experiment with, like building forts in the living room with sofa cushions, which can be a way to demonstrate his power and control through play.
Therefore, it is in the initiative vs. guilt phase that children will develop their skills through their independence, developing greater control, ambition and direction.
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