Came to say, 'invite them shooting. Invite their kids shooting with your kids.' Same as any other hobby.

But if you go to them treating your own hobby like it's so dangerous that you need to warn them that their kids will be exposed to the evil rays emanating off of your guns, they're going to believe you. If you treat your hobby like any other, they're more likely to, as well.

The kids can find any number of things in the kitchen, bathroom, workshop, etc etc, far more dangerous than your guns, assuming you follow the absolute basics of responsible gun storage.