Paint is the best thing for them, I think.
Zoom in to large size so you can see all the individual pixels as you are drawing.
(
monkeon schmonkeon,
Thu 26 Oct 2006, 16:29,
archived)
or pixen if you have a mac
(
mictoboy shitting in your cunt since,
Thu 26 Oct 2006, 16:30,
archived)