That's the one I had the most trouble with too!
FabShopHop is a website that lists shops...you go to their websites and try to find a bunny. Once you find it, you click on it and it registers you for prizes at the FabShopHop site. While finding bunnies, you randomly get parts of a quilt pattern or set of patterns. I don't know the rhyme or reason ...I've known people to get all the bunnies but still be missing some of the pieces to the pattern...however in both Jan and Feb I got them all pretty quickly.
A lot of the shops give you a clue as to where their bunny is...some are more blatant than others. I like the ones where it is blatant, but you have to follow the bunny through their website to get to the clickable link....
yes, it is free and is at www.fabshophop.com