Tennessee’s attorney general is suing Roblox over child safety concerns. Parents say the platform can spark creativity but also exposes children to serious risks.

Chances are that your child has downloaded gaming platforms such as Roblox, Minecraft or Discord onto their smart devices.

A teen accepts a friend request from an older “fan” on Instagram. Within days, that person is sending in-game gifts, pushing the chat to a disappearing-message app, and asking for “private” pics. That ...