Buldind a dark room at home...
Choose a room that is easy dark, preferably with only one window and an outer view is interesting.
Then cover the window with a thick black cloth or reinforced cardboard and make the material a small hole the size of Brazillian Reais 0,10 coin, almost like a dime.
Seal cracks and openings well until the fourth received only the light passing through the hole.
Wait until your eye get used to the darkness and watch the outdoor scene to project inverted on the walls of the room.
Magic!
Camera Obscura - Dark Room
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