Movie kid says "i wish the goblins would get you" to little brother/sister
I'm trying to find the name of a movie that I saw in the late 80's. All I remember was there was a little boy in the movie who had a younger brothr/sister that was crying in their crib and all he kept saying was "i wish the goblins would get you". The goblins take the younger sibling away and he has to find him. I remember there being a large staircase that he had to climb to get to his younger brother/sister. If anyone can help me find the title to this movie, I would really apreciate it.