The various attempts to raise primates as humans are a fascinating comparison, that I hadn't really thought about in this context before.

AI has the potential to learn so many times faster than humans, and it's very 'precocious' and 'perverted' compared to a truly naiive human child. I think as much human interaction as possible is what's called for, and then once some AIs become 'veterans' that can reliably pass Turing tests and ethics tests, it might be viable to have them train each other in simulated environments, to speed up the process.

I wouldn't be a bit surprised if Google (et al) are already trying something that roughly resembles this process in some way.