Not sure if this will work. Through some Internet browsing, I discovered the cartoonist Mark Parisi, who occasionally draws cartoons around a math topic.
Due to copyright laws, I cannot display any of his cartoons on this web site without paying a royalty. Rather, I will try to send you to his web site Off the Mark (searched for math cartoons)...hope this works.
When you finish browsing the 22+ math-related cartoons on his site, take some time to look at his other work. He has a sense of humor that at times overlaps that of Gary Larson.