Technically, YouTube is meant for ages 13 and up. However, just recently, YouTube launched a new "supervised experience" on the platform. This allows you - the parents - to set limits on features and choose the content you think your child is ready for. The content settings are now aligned with content ratings by age, starting at ages 9. As a result, your child can avoid most of the unwanted and questionable content on YouTube. That said, 9-year-olds can now watch YouTube safely with their parent's supervision. But if you want a more limited watching experience for your child, YouTube Kids is still a better option for 9-year-olds.