I'm not telling anyone how to raise their children, companies have terms of service. When we can't accurately assess risk, the default we reach for is an age minimum (social media, alcohol, driving).

If, in time, we find out that AI usage during developmental learning periods is a major positive, I'm sure they will give AI to 5 year olds, and I'm all for that.

Though, I have a sneaking suspicion it could be similar to kids with tablets. It encourages isolation, rewards addictive behavior, stunts personal growth, and enforces the concept of instant gratification.

That is an unnecessary default and also generalizes AI to the point of being analytically not useful.