Coraline

Having just moved to a new area, Coraline is bored and lonely. Her parents, engrossed in their work, shoo her away as if she were just the family pet. Left to her own devices, Coraline sets about exploring her new surroundings.

Inside the house, Coraline discovers a small door that opens up to a brick wall. That night in her dreams, the small door becomes a portal to another world -- a world where her "other mother" and "other father" (who are only discernible from her real parents by the fact that they have buttons for eyes) live. They shower her with affection, and she finds that the neighbors in that world are actually interesting.

One day, Coraline finds the small door locked, but when she obtains the key, it opens the portal for real. Upon entering her other world, Other Mother informs Coraline that she may stay there forever; all she has to do is sew buttons on her eyes to match those of her other family. Creeped out by the prospect, Coraline tries to go back to her real home, but she is trapped. When Other Mother shows her true self, Coraline fears that she may have lost her real family forever.