I have entered the Hoffman Challenge 9 times in the past few years. Every year Hoffman Fabrics puts out a feature fabric for the challenge. Your entry must use a certain amount of this focus fabric, plus anything else that you want. There are design rules and size specifications that have to be followed, but it's a great way to exercise your creative muscles. I have never won a prize, but every entry I've sent has been chosen to travel in the trunk show that tours the U.S. for the following year, so I'm pretty proud of that.
Here are the feature fabrics for each year that I entered, plus the quilt I made using it.
Peace and Harmony
Of A Feather
Pretty Pink & Purple Paisley Plumed Peacock