I have no children, but I am part of a family group chat where we discuss these things.
Thus far, 7yr and 10yr old nephews have not been introduced to LLMs. These kids already write code, and not introducing them to LLMs is somewhat analogous to the fact that they have not been given calculators for math.
At what age/point is teaching them about the availability of LLMs a good thing[0]? They will find out eventually, is a parental introduction better than just a random introduction?
[0] The creators of Django, Redis, and Linux believe that LLMs are not useless, so let's agree to move beyond that for the sake of argument.