This was definitely the book of my childhood. I've read it several times and every time I do it, the emotion just gets stronger. If you have never gone through this experience, I STRONGLY recommend you. Even though kids love it, it's NOT just for them! Please don't assume that this will be a silly, childish read and give Roald Dahl's best work a shot!
Okay, now I'll talk about my classification. There's no sex, drugs or alcohol references here, nor swear words. However, if you think your child is too easily impressed, you might want to wait a little bit. The thing is that the way that Matilda is treated by her parents, and especially the way Miss Trunchbull acts around children (and not only them!) may shock younger readers. So, know your child. Also, keep in mind that this is a book that EVERYBODY should read at some point of their life. That include you, parents!