We have pretty much exhausted potato-printing options in the last couple of years (robins, Santas, christmas trees and snowmen), so this year, we've tried a stencilling alternative, aiming for the effect of snowflakes.
It was very easy - my seven year old did most of it!
For this craft project, I bought a packet of paper doilies in assorted shapes (ours came from the Lakeland kitchenware shop), a roll of recycled brown parcel wrapping paper and some ready-mix white poster paint.
We used assorted doilies as stencils, using a thick children's paint brush to dab white paint through the holes, then lifting the doily away to reveal the pattern. We found a single doily would last for about three stencils before starting to disintegrate.
I'll probably vary my parcels a bit by using plain coloured (recycled) tissue paper and sticking leftover doilies on top for decoration.
If you want to look at more ideas for sustainable gift-wrapping options, take a look at this: http://thatlittlebitgreener.blogspot.com/2009/12/countdown-to-greener-christmas-wrapping.html