FEMA has a brochure and webpage to help kids prepare for and cope with disasters.
It includes advice such as:
You can create a Family Disaster Plan by taking four simple steps. First, learn what hazards exist in your community and how to prepare for each. Then meet with your family to discuss what you would do, as a group, in each situation. Next, take steps to prepare your family for disaster such as: posting emergency phone numbers, selecting an out-of-state family contact, assembling disaster supplies kits for each member of your household and installing smoke detectors on each level of your home. Finally, practice your Family Disaster Plan so that everyone will remember what to do when a disaster does occur.
Funny how everything comes back to that counter-intuitive instruction: "Place mask over your own mouth and nose before helping your children with theirs"...