When looking at other references for 72 hour kits, you will find the lists are so large you need a pack of elephants to carry everything.
The list below are ideas, we consider the priority in our kits to be: food for 3 days and a bottle of water. We have three large zip-lock gallon sized bags labeled, “Day 1, Day 2 and Day 3.” In each bag we then have three smaller bags one labeled “breakfast”, the other “lunch” and the last, “dinner.” This way, meals are already set out, no decisions to make and each tailored to the specific tastes of each person. Some people use MREs. But our children would not eat a chicken stew MRE for breakfast!
Each kit contains:
Plastic spoon (in each bag)
One change of underwear, socks, t-shirt and pants
Bar of soap in a sandwich bag
Small bottle of shampoo
Toy and or book
Ear plugs (in case we evacuate to a noisy building)
Toothbrush and toothpaste
Small package of tissues
Pen and sticky pad (for leaving notes and drawing)
Little brush. (elastic for girls hair)
Picture of the family with important phone numbers and any medicine information such as asthma, etc…
Example of "Day One" bag:
Sandwich bag of frosted shredded wheat
Cup of applesauce
Can of stew
Self opening can of tuna -1 can
Self opening can of pears - 1 can
Self opening can of nuts - 1 can
Water purifying tablets and/or water purifier
2 way walkie talkies with extra batteries (one for mom and dad)
All this is carried in a back pack or luggage with wheels. We kept the weight down on the children. The parents carry the extras. There is no way we can expect children or adults to carry three gallons of water per person for three days.
The car kit already has the majority of other needed supplies. We have prioritized any evacuation needs with our 5 min, 30 min and one day evacuation checklist.