[lily.]

This would be a different situation if the child were a young teenager. Then it would be feasible that the child might have an understanding of gender identity and be able to recognise that he/she doesn't fit in the gender they were born in.

When my son was 6 [and it's a good thing this site is sorta anonymous because he wouldn't be particularly happy with me sharing this now] he was pretty sure he was a rabbit some days. People would ask him what he wanted to be when he grew up, and he'd say 'a scientist'... which seemed like a sensible enough response, until he followed it up with 'so that I can make a secret potion which turns me into a rabbit'.

I didn't go into school and demand that a litter tray be provided for my son to use.

Same thing really.