Dim The Lights
You always knew it was going to be a pretty chill day when you got to the classroom and one of these was sitting in the middle of the room. Well, this type pre-dates my school days, but you get the picture. That's right, when we wanted to see projected moving pictures back in the day we used one of these, and threaded film through it, and it was noisy, and pretty bad, and we loved it. A wonderful does of nostalgia from builder Carlmerriam.
Original author: Tommy