> I would be surprised if the Lego Friends line, which was created with girls in mind, were marketed explicitly to girls. My guess is that the girls stratify themselves by what type of toys they are attracted to.
Lego themselves talked about lego friends being meant for girls, publicly and loudly. Also, all characters are girls. The kids in ads for lego friends are all girls too. It could not have been more clear that it is for girls.
The other legos at that time and few years before were very very clearly for boys. They used colors used for boy toys. Toy stores are clearly separated to boy and girl section by color. They also used themes that literally any kid over 2 identify as boys.
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As side note, claim that they are less about building then other lego sets for same age brackets is untrue. I dont know why the article felt the need to claim the difference is character vs building.
Actual differences against other themes are colors, fight vs life, indoor vs outdoor, gender of characters.