Can babies reach their feet? I really suck at this baby stuff. I really can't express how glad I am that Ruby is physically incapable of having a child.
If there's some kind of charm that could be used to help protect them, I honestly don't know one. The thing about demons is that the ways to ward them off are really specific. There are rarely any acceptable substitutes.
If you go through the complex, you'll probably be able to pick out the funny looking symbols on the walls. Those are Devil's Traps. They look like they've kind of got a star in the middle?
And, yeah. This is the stuff you'll be learning! It'll come to you easy enough once you've been through camp, I promise.