Ryan of the channel Ryan ToysReview is a 7-year-old first-grader who, yep, opens, plays with, and reviews toys in his super-popular videos; he has more than 17.3 million followers.
The pint-sized mogul, who now has his own range of toys at USA store Walmart, has doubled his earnings in last the 12 months to June.
A video in which Ryan, then five or six-years-old, finds toy eggs on an inflatable water slide has been viewed 1.6 billion times.
Forbes said almost all of the money came from pre-roll advertising, explaining "when views go up, so do these automated ad dollars".
The remaining $1 million came from sponsored posts.
However, Jake Paul still managed to have a good year, earning a career-best $21.5 million, capturing the #2 spot by beating out DudePerfect by $1.5 million.
He was followed by Dude Perfect at #3, DanTDM at #4 and Jeffree star at #5.
Ryan, whose last name hasn't been made public to protect his identity, beat top YouTubers such as Logan Paul, Felix Kjellberg (PewDiePie fame) and Markiplier.
Ryan's parents set up the channel in March 2015, its videos, since the day of launching, have had nearly 26 billion views and amassed 17.3 million followers.
Asked why kids liked watching his videos, Ryan replied: "Because I'm entertaining and I'm amusing".
As he is still a child, 15% of Ryan's earnings are put into a bank account that he can only access when he becomes a legal adult.
Logan was forced to apologise in January after accidently showing the body of an apparent suicide victim in Japan in one of his videos.