TomBoy

Tomboy is a film with a not so unusual theme, namely the question of sex and gender, androgyny, whether or not we are born in the 'right bodies' and what happens if we asume another gender than that our body and social upbringing has decided for us.

A Tomboy is a girl who - as in this film - behaves according to the gender role of a boy.

Laure/Michaël decides to dress and act like a boy when moving into a new neighborhood, this as she thinks it will be easier to become accepted, not least since she has seen that there are much more boys than girls around.
Partly this might be due to the fact that she is a 'boy-girl', and at this young age the differences between boys and girls are few and mostly created by the social upbringing and training, partly because she is in need of friends.
She is accepted by the boys and she also engage herself in a relationship with a girl.
Her parents doesn't know about all this and she initiates her little sister in her plot, promising her to participate in her games with the other children, if she doesn't tell the parents.
The little sister have already guessed - or this is the impression one gets from the film - that her older sister isn't living the way she is used to and this before she is told about her little 'game'.
Different clues lead up to the revelation of her acting and this leads to harsh treatment from the environment - parents, friends and their families - who can't accept that she has undertaken this staging, all this in a way stigmatizing her.
Will her friends and not least 'girlfriend' leave her or will she be accepted as Laure?
Why can't she continue to act like a boy, whatever this is and might she be accepted as a boygirl by her friends at school, even when knowing she is a girl?

One can say that this is a nice version of 'Boys Don't Cry' and as such a charming little story without any deeper complications, psychologically or intellectually.