that is so cool!
I would love to do that!!!!
I've been threatening the hubby about making our living room into a camera obscura...so far he's not going for it.
He did make me a nice dark out door for the darkroom, so maybe with time I can convince him we need a camera obscura in the living room!!
What I like the most is that everything was free, even in an event where people could easily afford paying for that.
I've seen a book once from a guy I can't remember...
he went around different places and transformed the rooms into cameras obscura, had the image projected on the wall and then photographed them, the book it's amazing...