If you want your kids to learn music, you should sing to them, dance with them, play music to them and just have instruments around at home they can play with. It same with language, reading, mathematics, anything really. So the imperative form in the title really irked me.
Saying that, I acknowledge this is Show HN and I am not speaking about the project per se (as in how it has been technically implemented), more about the general attitude the title and arguably the projects presents, where we think we can replace things we find challenging in life, arts or culture by shoving some code and a language model into it, but I too much answered as it were and argument someone making in more general post. I try to keep that in mind in the future.
In fact, I'd like to suggest that he's championing free range childhood by not making decisions for young people who might very realistically resent it as adults.
I know three people with perfect pitch. One of them thinks it's great (and is kind of annoying about it). The other two are constantly telling people that perfect pitch just means you're always exercising patience when your friends are singing, counting down the moments until they stop.
That sounds like a version of hell to me.
It just makes a significant difference when the context is a Show HN and the critical comment is at the top. If it is comment (say) #13 in a varied conversation, that comes across differently. This is more the fault of upvotes, as I mentioned, but it's hard to address those directly.