This exercise reminded me of when I was a child. I used to weave quite a lot. At first just paper weaving and later I received a toy loom from my parents.
Looking through the suggestions in this exercise, the possibilities are indeed endless. I started by weaving two pages from and old TV guide. On the green page there was an image of a bird and I quite like the effect that I got when I started weaving the other page through it.
Then I took two sheet of origami paper. The paper is a little thicker than the paper from the TV guide, so it was easier to weave.
I have an enormous collection of old envelopes because the insides of the envelopes are often quite pretty. I decided to experiment with the shapes of the strips. I cut the orange envelope in wavy strips and the envelope with the print in straight strips.
I received a map made out of thin card at a antique book fair. I have woven coffee packaging through it. I like the shiny surface against the matte surface. The map was quite sturdy so it was a little more difficult to weave.
Apart from old envelopes, I also collect used wrapping paper. When receiving a present, I always try to open it really carefully so I do not tear the paper. Family and friends have gotten used to me collecting wrapping paper, so I sometimes receive paper from them too. In the two samples below I used Christmas wrapping paper. I have cut the wrapping paper in wavy strips and woven yarns and strips of fabric through it.