Roblox's free and open communication policy means that kids' interactions can vary widely, from legitimate player engagement to iffy involvement with possibly predatory users. We've rated it for age 13+ based on continuing challenges with problematic content, but it's potentially OK for kids younger than that if account restrictions are turned on and parents pay close attention to their kids' activities on the platform. Posts and chats are filtered for inappropriate content and personal information references if a user is 12 or younger, and parents can restrict their child's chatting capabilities. We recommend that parents disable the chat functionality as a protective measure when they can't supervise their kids' play. We also recommend setting a four-digit PIN code that's required to make any changes to a child's account (preventing kids from giving themselves broader access) and change the security settings to allow kids to access only a curated list of age-appropriate games. Registered users who are 13 and older can also choose to alter their settings to restrict in-game chatting and messaging capabilities. There have been reports of users thwarting the chat and exchanging inappropriate messages with young players, and games that feature inappropriate sexual content, violence, and adult language; some kids have also been exploited by predators through the site. Despite Roblox's efforts at policing itself -- including using human moderators, implementing digital-civility rules, and more -- bad actors continue to find ways to share dubious content, both on the site and off, including uploading inappropriate game clips to YouTube. There's also a commercial element: Kids can purchase Robux, the in-game currency; obtain it by selling shirts, pants, or game access; or receive a monthly Robux allowance by signing up for a paid Premium membership, which allows you to buy, sell, and trade items to earn more Robux. As always, it's a good idea to read the developer's privacy policy for details on how your information (or your kids') is collected, used, and shared, and any choices you may have in the matter; note that privacy policies and terms of service frequently change.