I only have four small kids, but you're approaching this from the single kid direction. Once you have two, you stop caring as much about the first precious one

I only have four small kids, but you're approaching this from the single kid direction. Once you have two, you stop caring as much about the first precious one - because you have two precious ones. So sometimes one has to wait. Repeat that a few times, and you'll arrive at your answer. With more kids, it becomes clear that there are things you simply cannot do, e.g. own a 11-bedroom house or drive each single kid to soccer. So the kids will have to do something else. Like playing with each other. That's just the way it is. There's virtually no free time, though. :)