How I wish I had read it in my childhood!
Matilda is about perseverance and self-defense against bullies, regardless of who the bully is. This trait is lost and even condemned in our Iranian culture and education, and has given way to sacrificing oneself and one's interests for the sake of others' interests (usually those of the "sacred" others!).
Read it and give it as a gift to the children around you. With the hope of a braver and more independent generation!