It’s not too hard to get a license for one, but you’d never have it at your residence, it’d be kept at the range, and even with the keys, the kid would not be able to get the gun from the range.
As far as I know there’s no range which would provide gun storages for it’s members for various reasons, most obvious being that they don’t want the liability in case something, like a break in, happens. At least outside big cities this is something that doesn’t and can’t exist. Additionally, by law, the guns must be stored at the primary residence, unless you make special arrangements otherwise, like having a safe at the range with electronic alarm systems and all the jazz or stored with a gun professional in case you intend to sell it/have it repaired/things like that.
With hunting weapons (rifles, shotguns) it’s even more obvious that they can’t be stored elsewhere, but that’s a whole another matter.
For the license you need to have a valid need for a gun of any type. So you need to prove that you’re active hobbyist (no need to join any kind of club or association, regardless of the user case) and prove that you’re mentally and physically in good enough order to own a gun. And that is a fact as I went trough the whole circus few years ago and got myself a permit.