Roblox creator Jacob Girdler joined the popular platform in 2011 on a whim. Now he makes a six-digit income from one of his games.

With 12 million users last month, Roblox lets people create their own virtual immersive experiences, like modeling in a fashion show or making pies at a pizza parlor. Users buy virtual currency ...

Roblox is updating its $35 million Creator Fund to include more game-makers including developer studios, users and brands -- to build content that expands beyond kids' gaming.