Gremlins
Although Gremlins is somewhat marketed as a children's movie, it's not for little kids. A Chinatown shopkeepers sells a man something called a "mogwai" as a pet, warning him that he must care for it properly. Things go awry, and the mogwai spawns small, evil monsters known as gremlins, which wreak havoc on the town.
Before I Wake
A young couple whose own son passed away welcomes a foster child into their home. They soon learn that his dreams can come to life while he sleeps—but so can his nightmares. Before I Wake is more heavily reliant upon supernatural phenomena than blood and guts.