The internet’s biggest recreation zone for kids is struggling to keep predators off its platform.

Roblox is a huge sprawling world of games which is sometimes described as a kind of primitive metaverse. It's one of the most popular children's games in the world.

Roblox accepts it has a problem: "We know there is an extremely small subset of users who deliberately try to break the rules," a spokesperson told the BBC.

For years, the online platform Roblox has been a fascinating outlier in the debate over digital regulation — a cute, customizable universe filled with kids solving puzzles and jumping through ...