Threadless is doing a TMNT themed design challenge. I wasn't going to even try entering it, but then this idea hit me...and it had to be done. It was fun doing something cute and stylized like this. If it doesn't get printed, it'll be easy enough to remove Splinter and the masks so I just have a cute design of a tower 'o turtles.
Link
RannaDes
Even if it doesn't get printed, this is a very cute picture