Transgender children

So I just learned that in my kids school district (my kids aren't in school yet my oldest will be starting kindergarten next September) there are twin boys who identify as girls. They are 5 years old. What's your opinions on this matter given they are 5!!! I don't believe that at that age they really understand the whole thing. So the entire school had to take a course on how to handle transgender children. For example they can't say girls go this or boys do that. What are...

Im having twins a boy and a girl its my first pregnancy im 4 weeks now