Kids have wide open perspectives, in general... and they have imaginations. The field of view gets smaller and smaller as we age and we see less and less except things we have categorized and assume to be the way we categorized them. I can still remember how vivid an imagination I had as a kid; bothers me that the "seriousness" of adulthood overtakes and stifles it. I was never bored as a kid. I could amuse myself with just about anything because things could be looked at in different ways. Doesn't surprise me that many kids don't see gender as this wall or box you have to be in or else. They see it for sure, of course - they recognize the difference between men and women or boys and girls visually, but they usually have no hangups about it, or about not being able to easily tell the difference sometimes.