Much of that is utterly unhinged. No wonder they’re called gun nuts. Increase children’s exposure to guns? Reduce gun-free zones?
Many countries have proven the best course is to put heavy penal sentences on gun violence and negligence, to severely limit the people allowed to handle guns, the quantity of guns they can have, and to tightly restrict the places and times they can handle them.
Not to spread them around more.
Why expect children to find guns? That sounds more like a matter for removing the child from irresponsible parenting rather than education.