Gremlins - 3 Rules 1000 Piece Puzzle! Gremlins story follows a young man who receives a strange creature called a mogwai as a pet, which then spawns other creatures who transform into small, destructive, evil monsters. There are 3 Rules to know when caring for these cute creatures ignore these and uncontrollable havoc will commence: Don't get them wet. Don't expose them to bright light. Don't feed them after midnight