Somewhere in the set (I think it's near the bed), there's a framed piece of construction paper decorated by a handprint with claws drawn on all five fingers -- that's the little tipping-the-hand to show thanks to the people from the Elm Street movie who made the set.
I can't find it on the Youtube window, but I noticed this when I saw this movie in the theater when it first came out, and have had it confirmed in various Elm Street fanboy crap that I read in the late 80s.