Depending on what happens and where, my kids are covered.
Not just their own knowledge, but friends and family.

Anything happens to us normally, there are two sets of grandparents making time to get here.
Friends and co-workers can handle it for the short term.

Post-SHTF, the older two are picking it up quickly and can/do watch out for the youngest.
The eldest, she’s picking up dad’s temperament combined with mom’s attitude, she’ll be a force to be reckoned with.
All else fails, several friends would take them in for the duration, same goes for their kids.