Fast Company on Instagram: "Waldo, the 17-year-old protagonist of Jennette McCurdy’s debut novel “Half His Age,” is constantly buying something—clothing, junk food, makeup products. @jennettemccurdy is fascinated by teenage micro-vloggers who document the purchases they believe define their personalities. “You want that identity. You’re craving that sense of identity,” she says. “You know things you wish you didn’t. You want to know more than you do. It’s such a complicated age.” In this episode