I was of the generation that suspected that if you brought up girls and boys exactly the same then they would grow up non-sexist , even,well-rounded, sensible adults etc. but having a boy and a girl made me realise that this was all idealistic nonsense.
They naturally gravitate towards different toys,even different colours and even though my daughter was not particularly girlie, she now at 15 loves jewellry,pink clothing ,and shopping. My son is a typical 'boy' and loves playstation games, guns,and cars and hates buying clothes and having a bath!!(though thankfully dislikes football) -I did my best.I still don't see anything wrong with buying a girl a scalextric or giving a boy a cuddly toy, but you'll soon find out what they prefer.
I don't think we can change the gender differences and we shouldn't want to.Get them what you think they'd like,not what you or anybody else thinks is right.