I was reading Bugs and Fishes from Lupin's blog the other day, and she reminded us all of the Big Knit campaign run by Innocent Smoothies every year. (You should see all the little hats she had made!).
I didn't get mine posted in time last year, but I still have them, so I think I'll gather up some scraps of wool and add to the collection and actually send them off this time.
Here's the details - http://www.innocentdrinks.co.uk/thebigknit/
Plus there are free knit and crochet patterns on the site if you are stuck.
I'll be treating myself to a smoothie tomorrow, just to check my hats fit of course. :)