Get inside a camera

I was watching a programme about photography, something that has been a long time interest of mine, when I saw something I'd love to try. Blacking out the windows of a room, somewhere in Venice I think, a small hole was cut in the plastic sheet used for blackout.

All of a sudden the upside-down image of the outside world is projected onto the wall of the room. It was amazing. 

Strikes me that this would be a great thing to try in a classroom. We're  constantly being told of the need to bring stuff to life in school, if you have a classroom with an interesting view and lots of natural light falling on the image it might be worth trying. Perhaps they might let me try it at my local school if I ask them nicely!