my sisters daugter

Hehehe the only thing you can do is to just let her be, and she will grow out of that habit later on hahaha It is very much normal for girls to sort of try to be boys or something like that. THere is no need to worry at all, because I used to be exactly like her hahaha when I was in primary school. I like to play with boys, playing boys games, play robots instead of dolls, climb trees and of course pee standing up hahaha but later on, around when I was 12 I start to show a bit of girl side :P Maybe it is just that hormon started kicking hahah and now Im hundred percent girl (well still a tomboy sometimes) but most of the times I act like a girl, I dress like a girl, I love girl stuff, I dont like boys games anymore, I think like a girl, I love shopping now (used to hate it very much) and of course I pee sitting down just like a girl hehehe so there is no need to worry about your niece :) She is just in that stage where she is very curious and trying things out :)

Wow a Tomboy extremist!! I am not sure what the right thing to do would be but I would think try to find something girlish that may interest her.... possiably shopping for clothes, getting her hair done, have her nails done, shopping for make-up (not the colorful kind just lip glosses and fun stuff like that) girl type movies (cinderella storey, Lizzy McGuire) I know my step daughter was/is very much a Tom Boy but over the course of a few months she is starting to pay alot more attention to some girly habbits.

it might just be a phase. just let her be and ignore it. maybe the more you get upset the more she'll do it just to get to you.

don't worry my friend!she is only 10 years old.and are you a boy or girl?if you are a boy,dont care about that!she will learn by growing up.some girls are like this.may it is because of parents by letting her as a boy,by dressing up like boy!