Here's a movie that's so badly written that it gets its title confused. I'm not sure why it's called Grandmother's House when the grandfather is actually just as bad and is actually the heart of the movie. Character motivations are murky and nonsensical. Wildlife sound effects are used to the point of absurdity. Zero suspense, zero surprises (the "mystery" is obvious 20 min into the movie), and laughable acting. Skip it.