Birthdays

To the parents of the birthday boy kindergartner who didn't get picked up for a full hour after school, who spent the entire hour fidgeting with his paper cone "Birthday Boy" hat, staring out the window hopeful that the next car to pull into the parking lot would be you: Why did you have children? 

I understand that people have to work or have other obligations, but to not make other arrangements for your child or answer your phone when the school calls asking someone to pick him up, on his birthday no less, I don't understand.