Because I have my degree in Early Childhood Education from the University of Kansas, I spent many hours debating Nature vs. Nurture. We also frequently discussed what toys you should allow children to play with (i.e. should boys play with guns and swords?) That was of course before I had 4 children of my own. I'm here to tell you, it doesn't matter what toys you give 'em, boys are going to turn it into a gun or a sword.
And girls, well, they will turn the plastic packaging for garden hose washers into a phone.