Julia came home from school and began to cry saying "You didn't pack me a lunch!" I told her that I had and then remembered. I had taken her empty lunch box and never opened it from the day before. I had simply just reattached it to her bag.
When she got to lunch at school and opened it, there was nothing inside. She cried and was able to go through the lunch line where they served mac n cheese that she hated.
Life lesson #1243534: When in doubt, open your kids lunchbox in the morning to be sure you actually packed them one.
Life lesson #232432: Teach my five year old to pack her own lunch. Then you know for sure that there's something to eat. ;)