I have an idea, that might have to come into play while on this course...
I would create a blank object; A BOX A BOOK A PAPER BAG and have the class cover one each. What a great exhibition that would be? Filling a space with identical objects and diverse designs. It would be the designs made focus ratehr than the object in question.
A blank canvas doesn't have to a an actual canvas...does it?
Hell...I want to do this myself anyways! Paperbags all the way...easy to store aswell.