Just like many forms of content there's an appropriate age. The problem with AI, with regards to kids, is it's as wide as the internet.
There's lots of great parts. My kids ask great questions and get even better, accurate answers; moreso than I can give. But then, there's lots of parts that shouldn't be introduced until later with other parts arguably not introduced at all. I've met kids who have unfettered internet access at age 10, and the results aren't great.
It's all there, just a question away - just like the internet.