When he was a boy, Dan Middleton used to dread this kind of thing—having to talk to people, getting attention. Even as he got older and started making his videos and quit his job at the ...

Never heard of DanTDM? Your kids probably have. The 25-year-old boasts a sold-out global tour, an original series, a bestselling graphic novel and merchandise so popular it’s hard to keep in stock. He ...