it doesn't require too much effort
it doesn't require too much time (yet can be done ANY time!)
it doesn't require too much fancy tools (pen and paper will do)
it doesn't have to be solely on paper either!
it doesn't require any proper desks nor tables (or software)
it doesn't require any skills (like sewing, doh! still practicing myself on that one)
if it doesn't turn up well, you can always sketch some more.
and it's soooo much fun, it's highly addictive. Don't say I didn't warn you.
Some sketches I did this week. :)