How Ryan’s World, launched in 2015 with a then three-year-old Ryan Kaji, grew into a content behemoth with 10 YouTube channels and deals with Amazon and others (Jay Caspian Kang/New York Times)

Jay Caspian Kang / New York Times:
How Ryan’s World, launched in 2015 with a then three-year-old Ryan Kaji, grew into a content behemoth with 10 YouTube channels and deals with Amazon and others  —  Ten-year-old Ryan Kaji and his family have turned videos of him playing with toys into a multimillion-dollar empire.