I agree with you Blahblah about there being two sex male/female, girls tend to like dolls, prams, teddies, whilst boys like, trucks and cars. However don't you think that each sex should have a choice in the toys they play with, girls should be have a variety of different toys: such as Lego, Trucks, cars, robots, dolls, prams, craft sets, and the same with boys. Not limited toys, due to their sex. So I bet you think that women cannot do male dominated jobs, such as engineering, Military, and science and men, nurses, secretaries, models.
Don't you teach your children to choose whatever they want! Be whoever they want! Your ideas are very limiting. If girls and boys rarely play with toys from the opposite sex, is it because their parents and caregivers, like yourself, have condition them from a very early age, to prefer certain toys.