Photograms or Rayograms as they are sometimes called, have been around since not long after photography was invented.  No camera is involved with photograms.  Rather an object(s) is placed on a piece of light sensitive paper and then exposed to light.  If normal photographic paper (i.e. negative paper) is used then a light image is created on a black background.  However, if a positive paper is used then a dark image is created on a white background.  If that positive paper is developed in lith developer warm tones may be produced with interesting results.

So, with a few thin strips of torn paper, old leaves and grasses, and coffee grounds and you can play in the darkroom for days.  For a different series of photograms visit the photogram gallery on my website.