See I'm 34 and basically same story read the book and many other King novels by the 5th/6th grade. The book gets seriously dark at the end too especially for an 11 year old
"oh yes georgie, they float, they all float down here. and when you're down here YOU'LL FLOAT TOO!"
Didn't sleep for weeks after seeing that as a kid, in fact a few of those scenes of Pennywise haunted me for years.