At that age, (2-5) the parents are the ones deciding what clothes to dress the kid in and what toys to buy them. Parents have total control of the early formative years. Which means, essentially, they can really screw up that little child's head big time.
My opinion (for what it's worth) is if the child is male, treat them and raise them as males. That means toys, games, activities, clothing, etc... Now..... if the child upon reaching an appropriate age has gender identity issues, then you can have a deeper look....actually that young person/adult can have that deeper look.
In the event you think I'm biased to the conservative side of this issue..... case in point: My little brother, growing up, did all the normal boy things. He and I were raised as "rough and tumble" boys of the 50's and 60's were raised back then by our parents. We hunted, fished, played baseball and football, and did all sorts of typical boy things. We both dated girls, got married and had kids. As he approached his mid 30's or so, he began to feel like he wasn't quite "right". He later told me he had felt this way since puberty as a teen but kept it quiet for social reasons. Long story short, after many years of counseling and therapy to resolve the issues, he opted to undergo gender reassignment surgery. Now, my brother has become my sister legally and in every other way as well. No one pushed him to this decision other than he himself but only when he was an adult and fully capable of understanding ALL of the ramifications involved.....certainly not at the age of 2 or 5.
It was undoubtedly harder for the family to accept this than it was for my brother to do this. My brother has been my sister now for many years and we are all on good terms and while I don't agree with the choice, as well as other family members don't agree either, we accept that this is what our sister wanted, and she has to live with this decision. She does seem to be happy, well adjusted, and enjoying life as a woman. She still wears camo, drives a 4 wheel drive truck, runs a business, fishes and hunts and field dresses the game..... so hey..... life is good. I go to visit, stay with my sister when I do and we go out and hunt, shoot guns and have a good time..... just like the old days......except she can't pee on the trees in the woods anymore like I can or write her name in the snow as easily.
my 2 cents