I don't care if my LO want's to play with so called "boy" toys. If I have a boy someday, he is more than welcome to play with "girl" toys, (dolls, barbies etc). We have a friend who always says "No, X you don't want to play with that, that is a girl toy" I think it's great to let them imagine and experience different types of things, rather than limiting them to what they can play with. Would you/do you let your LO play with toys that are generally geared towards the opposite sex?