@Mor - It's a tricky situation though. There are several countries in Europe where they are actively trying to ensure that gender isn't taught in schools. So, they carefully pick books that don't talk about gender and they refer to all the children by the same pronouns. This is supposed to promote equality between the sexes.
But, at the same time, people in these countries can face discrimination when they need gender reassignment. Until very recently, Sweden required people to be sterilized before they could undergo reassignment, for example.
I don't think the answer is to try and erase gender altogether. I think that it needs to be addressed in a more complex and open minded way.