Inside the business of a YouTube child star

Ryan Kaji was just three years old when his YouTube channel, Ryan’s World, took off. Initially launched by his parents in 2015 as a way to keep friends and family in Japan updated on Ryan as he grew up in the States, the channel now has more than 37 million subscribers and 58 billion views. As Ryan has grown from a kid to a teen, his videos have evolved from toy reviews to science experiments and even animation. His empire now includes a Nickelodeon TV show, a licensed toy brand, and...