A typeface made from duct tape
One of the first typographic experiments of Autobahn was Tapewriter: a font based on the grid of a football cage.
The width of a roll of duct tape, being the ‘writing material’, perfectly matches with the space between two bars of this cage construction. The idea behind the font is that anyone who is in possession of a roll of tape can present his or her message to the world.
Tapewriter clearly demonstrates that you can write with anything, and that any surface can be a sheet.