I would say that the vast majority have access to all sorts of knives. American kitchens are stocked with them.
There are some parts in this country where darn near EVERY child has their own gun & ammo and full access to it after being taught how to use it and gun safety.
Good grief...Reading here it seems so many children are coddled, and excused so much these days and have so few responsibilities their IQs have plummeted over the years. That's scary!
there are much country's with less or no children who killed someone, all those countries have very strict weapon laws and the adults are responsible for their children.