@cookie_mumbles this appears to be from 2017
Newer article from NPR in 2021
https://www.npr.org/2021/08/31/1032725392/guns-death-children
Newest I can find is this
https://www.thetrace.org/2023/06/children-gun-safety-accidental-shootings/
Which asserts an average frequency of almost every other day where both the shooter and victim are children under 13, with 2/3 of the incidents being self-shooting.
So all around still horrible and preventable.