Personally I would vote "no" regardless of whether I had confidence the kid wouldn't be exposed to the dregs of the Internet, for two reasons: 1. LLMs are I think pretty inarguably bad at answering certain types of questions in a factually accurate way, at least without nontrivial prompt engineering. I don't think many 8 year-olds will recognize which types of questions the LLM will give inaccurate answers to, or be…
I wonder how would LLM compare to average pre-internet adult an 8 year old might have access to. People are also bad at accurately answering questions.