Instead of the shape challenge lets create a Christmas ornament. I know we have done something similar to this before but it's close ti Christmas and I know it's probably too late but lets get a jump on decorating Gare's Christmas tree, assuming he will do this again this year.
If you need any guidance see Gary P's excellent tutorial here: http://www.xaraxone.com/tutorials/dec07/index.html

EDIT: I have an idea for one and will start on one right away. Which means I'll have to put my other project on the back burner again.