Make a simple bead curtain with basic things you have lying around the house. When thinking about bead curtains one just needs to take a look back into the seventies and find that beaded curtains were very much a part of that error.
bottle cap hippie door - definitely making one soon !
bottle caps clamped over string or fine wire.
I doubt if my roommate would let me do this.
... in a remote part of the interior of Dominica had this 'beaded' curtain made out of beer bottle caps
Photo Slide Curtain. This would take forever but I love it!!
Dishfunctional Designs: Upcycled: Neat Projects Made With Old Photo Slides - I wouldn't convert all the slides to digital and then make curtains like some of these designs (slides last longer than digital!) but surely there are some duds to play with.