Pet Sematary would be scary enough for children simply because it features a really cute little kid getting smeared by a semi truck, then coming back to life as a demon child who kills his own mother.
But that's not even the scariest part of the film. Pet Sematary doesn't start supplying nightmares wholesale until Zelda shows up. This memorable movie monster is actually just a girl whose sickness turns her into a twisted witch. The only thing worse than having a monstrous sister is spooning slop into her weird mouth everyday. She doesn't work so well on adults, but no one who met Zelda as a child ever forgot her.
