Angel, for your grandkids there is the What-If Game. This is not just a 'tell them' game, you want to make them think. Let them give the first ideas, and LISTEN to what they say, how they're thinking. Their outlook of a situation and yours could be miles apart. Then guide their thinking with suggestions of what would be better. And they should be able to ask YOU WhatIf questions, too.
What if you came home from friend's house and no one was home?
What if you smelled smoke in the house?
What if the fire alarm went off?
What if you got lost at the mall/in the woods?
What if you couldn't wake up the babysitter?
This game can give you clues about what they're afraid of, how they're thinking, what they expect, etc. Be aware that much of what they think the world is like is from what they see on TV; they need to know that that isn't real.
There should be info here on the Hug-a-Tree Program. If you can't find it, ask; people here can direct you.
Their kits need to have contact information sealed inside it, maybe inside the lid. Also medical emergency info, any meds they're on, anything they're allergic to.
Sue