The online gaming platform Roblox — which allows users to create and develop their own games — has attracted the attention of some 78 million daily users. More than 40% of them are pre-teens. But ...

KATY, Tex. — Graham, 10, has dreamed of being a YouTuber since he began watching videos on the platform when he was just 3 or 4. “I think of myself being happy doing YouTube,” he said. “I feel like it ...