> He requested that age requirement,
Who?
> it makes him looking like an etatist.
Pardon me, but what does that mean? Is that a typo, or am I simply ignorant?
> Some kids use to solder earlier than at 10y.o. so the intended audience is wrong. If the kid has not learned what is a transistor by the age of 5 yet, they are not an intended audience.
I don't know. I can't speak for anyone else, but I do have a history related to that. No one around me knew anything about transistors or soldering. I learned those myself by referring books from the library and few others that I convinced my parents to buy me. But it was well after I was 5. The learning was rapid once I got started.
That's why I confidently said that the age is a guideline and that it may vary between individuals. Learning in children is quite chaotic and it's difficult to establish hard and fast rules.