13 Ghosts (1960). For laughs, I ordered a William Castle double feature blu-ray for my wife and I to watch. While it didn't come with the "original ghost viewer", I had 2 old, red/blue 3-D glasses lying about. It's not a 3-D movie, but if you look thru the red side when the screen turns blue, the background is dimmed and the ghosts stand out in red. If you look thru the blue side you don't see the ghosts (for those too scared). Castle always had a gimmick. You can still see the red ghosts without glasses, but they stand out more looking thru the red lens. It was under $10 and one of Castle's "better" flicks.