I waxed my 11 year old nieces brows and the sides of her top lip as she was getting really down about her strong dark hair.
Her brows met in the middle and it looked from a distance as if she'd been drinking blackcurrant squash!
I asked her several times when preparing for her appointment if she really wanted it done and each time was met with an eager and definite "yes!"
I used Berins hot wax and when I'd done and showed her in the mirror, you could see the relief physically leave her.
So yes, providing it is the child who wants it and your insurer is ok with it, do it. Isn't building self esteem important for younger girls too?
Xx