This book is not for kids under 12. My son who is 10 started reading It because his class mates had started it and he previously hadn't been into those kinds of books he only really wanted to read skull D pleasant and the book gave him bad nightmares for nearly a week.
My 12 year old has read it and didn't get nightmares but he is has always liked those kinds of books so I recommend it for no younger then 12 but a great book for 12 year olds.
This title contains:
Violence & scariness
Drinking, Drugs & Smoking