There are pros and cons to this site. First of all, if you're thinking since it downloads software it downloads malware, you're wrong. It's a safe download, and if you have any trouble downloading there's plenty of help to be found. As for the benefits of this site, it's a very good learning experience for your children. They learn about business and buying/selling, they learn how to create games with the easy to find and very detailed game creation tutorials and scripting tutorials, putting them on the path to learning programming languages (The one used in this site is called ROBLOX Lua, it's excellent), and they learn about how to keep and stick to a budget. There's the option to upgrade your account to Builder's Club, and there are plenty of features to be used with this. However, the site also has some flaws. It's very easy for younger children to end up on phishing sites from bot-accounts made by the owners of those sites. Before allowing your child to make an account, make sure they are aware of web-safety and how to keep their account from being stolen. If your child is educated on web safety (Which they should be educated on before being allowed to browse the internet), there are no concerns.