Apparently, Scotch Brite sponges are well-known to be made of a conductive material. You could technically hold the yellow side of a Scotch Brite in your hand and control your iPad with the tip of the corner of the sponge.
But before you get sent to the loony bin for operating your iPad with a sponge, try this hack: Wrap a bit of craft wire around a cut piece of Scotch Brite sponge. Then, empty the inkwell from a cheap ballpoint pen and poke a little hole through one side of the case near the point of the pen. Draw the wired sponge up through the pen point, leaving a little point of sponge exposed at the end, and wrap the excess wire around the outside of the pen case.
As long as you have your finger resting on the wrapped wire, that bit of sponge at the point of the pen will allow you to point and drag all over any touch screen.
So if you ever find yourself without fingertips, but conveniently in the company of some conductive wire (paperclips would work, too!) and a Scotch Brite sponge, you know you can still whip out your iPhone and dial 911. You should definitely go do that, by the way, if you're still missing your fingertips.
Want more DIY Stylus options? Check these out:
- Create Your Own Cheap & Effective iPad Stylus
- Create Your Own iPad Stylus Out of a Sock
- MORE/REAL Stylus Cap Converts Pen For iPad Input