There are always comic geeks out there and most of the time they are the same as math geeks. (I am one of them!) Comics are a great way to get artistic creations from students and learn about the math they are doing at the same time. First, show examples of comics and comic strips that incorporate mathematics in them.
Next, have your students write their own comics that incorporate the lesson or the previous lessons in their comic. Everyone loves to draw and it is not about how pretty or neat they look, it is about if they have the math right.
My class does gallery walks to show all the classes the comics they had written and sometimes I choose a prize for having the most creative or the most accurate comic strip.