A point we'll raise frequently in Media is how gender is socialised or encoded from birth, with established commercial, retail logic and expected behaviour and aspirations signified through the prevailing binary of toys and clothing.
This Gap ad is an especially clear example of this, putting the future scholar (boy) in an Einstein tee-shirt but the 'social butterfly' (girl, presumably aspiring to become reality TV or gossip mag fodder) in a showy splash of pink...