Nothing would seem simpler than seeing at birth whether a child is a boy or girl, right? After all, gender is determined from the moment of conception: Two XX chromosomes means a girl, an X and a Y chromosome means a boy. Is that really all it takes to makes us who we are? How do our brains know our genetic identity?One of the stereotypical differences in behavior between boys and girls that’s often said to be socially conditioned is the way in which they play. Little boys are wilder and more active, preferring to play with cars or to pretend to be soldiers, while girls prefer to play with dolls. Have you ever wondered why you or others act differently than socially expected? Bring all your questions and let's have a dynamic discussion with TJ, the Popcorn Club scientist, on this incredibly interesting topic.