Experience Tumblr like never before
Ya know, ya gotta wonder if there's quirks in BNHA whose activation conditions are just... Not possible for pre-pubesent kids? Stuff that's hormonally based or requires specific pathways to exist in their brains?
I would say that logically, given the spread of quirks we've seen in canon, the chances of this kind of thing being possible is very high.
Or, if not, it's only because the quirks themselves alter the individual so that the activation ingredients are present regardless of whether or not they technically should be as a type of inbuilt, quirk-related mutation type of thing that expresses itself even before the quirk is technically activated.