I have 2. I will grab the small one first.
The small one:
Important documents, external hard drive with all our photos, list of important phone numbers (insurance, bank, family, friends, etc.).
DC's health book and our family book (both essential here). Our passports.
Cash and an A-Z of our city.
Windup torch. Survival blankets. Rain ponchos. Mini first aid kit.
A life straw and water purification tablets.
The big one:
Change of clothes each, windup radio, water bottle, biscuits. Nappies (until neither child needed them). Baby wipes. Tissues.
To be honest, I really need to check both of them and check I have everything I need.
Some preppers have proper bug out bags with camping equipment etc. but I don't.
What set me off was reading a post on MN years ago that said "Imagine you were standing in the rain in the middle of the night watching your house burn down. What do you wish you had with you?"