There's a cartoon on Cartoon Network right now called Clarence. It's about a boy growing up in rural Arizona. There's no magic or gimmicks it's just good old fashioned kid stuff. One episode he draws a comic for the school of a potted cactus that farts in the last panel. The comic gets banned and the students organize a protest to get the farting cactus reinstated. The principal even protests undercover. I think it would make a great shirt!