Safe for most kids
Roblox is an online game platform and game creation system that allows users to program games of their own and play through others’ games.

In-depth breakdown

Minimum Age Requirement
None. Users over the age of 13 have access to additional features.
Messaging Capabillities
Users over the age of 13 can send and receive private messages.
Location Sharing
Roblox does not publicly share user location.
Parental Controls
Roblox has robust built-in parental controls that allow parents to customize a child’s experience in the game.
Roblox teaches children the basics of programming and game design. It is utilized primarily by younger children.