This weekend, thousands of motorcyclists are riding on the Black Hills for the annual Sturgis Motorcycle Fair. For many of them, an 8-year-old's lemonade stand has become a popular stop.

Wyatt started the free lemonade stand last year as a way to raise some money to buy a Lego set. But on the first day, he not only made enough cash to get his toys, but he was able to donate $200 to St. Jude Children's Hospital. "So now, 50 percent goes to college," he explained. "30 percent goes to St. Jude and the rest goes to... last year it was Legos, this year it's a dirt bike."

This year, Wyatt's lemonade stand went viral after someone posted about it on social media. "I'm still trying to figure out exactly what happened," said his mother Robin Dennis. "This just blows my mind."

So far, the post has been shared more than 60,000 times and encouraged hundreds of bikers from all over the U.S. to the Sturgis motorcycle rally. "He loves it," said Robin. "He loves seeing the people. He loves waving to the people. Even if they don't stop, they ride by and honk their horn. He makes many friends and becomes more confident."

Whether he's serving lemonade, posing for pictures, or sitting on a motorcycle, Wyatt has become something of a local celebrity. He's raised enough to donate $4,500 to St. Jude this year and he has no plans to pump the brakes anytime soon.

"As long as he's having fun doing it and it's what he wants to do, we'll be out here every year serving lemonade to everyone who's here," his mother said.