This kid's video can't be missed. There are so many judgements around when an individual, child or not, can decide they no longer feel comfortable in the gender they've been assigned by society. There is so much variety though! Are there rules and standards? Who are we to generalize? Some people just know, no matter how young they are, and we must respect and acknowledge that. As a therapist in NY, I believe the only expert to one's experience is that individual.