GasDoc and All,
In that GasDoc had the thought of "who would take care of my kids?"...
We all should know via a Will, delineating not just the executor of our estate, a but also the guardian for minor children should parents co-decease. In addition, because we are all driving fairly expense cars, we have assets. Estate planning would limit the use of inherited assets by our children based on our wishes. I wouldn't want each of my two boys to have half of my net worth available to them on their 18th birthday.
Remember, whatever you don't decide while alive, a Probate Judge gets to when you're not - with mother-in-laws and aunts telling the kids and the judge how evil the other is because they believe they are the better caretakers (or just want the funds).
In addition, Healthcare proxy, Durable Power of Attorney, etc......
NOTE: I'm not an attorney - this is not a solicitation. I'm a practicing CFP and see the interaction of death and greed often. If you haven't done this yet, please do. You will walk an inch taller once in place.