You are invited to a child’s birthday party. As an adult with no children you have no idea what kids are into these days, and hope that your random purchase at Toys R’Us will be acceptable. When you enter their website or their store the first choice you make is based on the sex of the child. Is the child a boy or a girl? Although most of the toy categories under boy’s toys and girl’s toys are the same except for a few, within the categories you will see a difference. Within the building sets and blocks category the page looks different if you are in the boys or girls section. For example, girls have a Lego play house, and frozen treat stand. The boys have a technic hydroplane racer and Homing spider droid.