" In the back of his classroom, he put his outdoor shoes in a nook and traded them for indoor flip-flops, just like the other students. He noticed that many of the kids wore colorful socks with sayings he couldn’t understand—or cartoon images of Batman. The school banned makeup, earrings, long hair, and hair dye, so socks seemed to be the main outlet for free expression. "

― Amanda Ripley , The Smartest Kids in the World: And How They Got That Way