1. Have them memorize important contact information.
Most young children know to call 911 in an emergency but do they really know what that means? It is important to show them if they are using a smart phone, how to unlock the phone, how to get to the phone screen and how to make the phone call.
*be careful that they don't really call them during practice because you don't want to tie up their lines for a non-emergency.
Make sure the children also know what constitutes an emergency. Also teach them what to say. Look here for roll play ideas.
2. Let them work with you.
Teach them by working side by side, in the garden or other age appropriate responsibilities around the house. Teach them fire safety and if they are old enough, how to start their own fire with a magnesium stick.
3. Exercise regularly.