What they do when they are supposed to be napping

Isabel sounds like the boss of this outfit this afternoon, but don't let the sound of things fool you. I heard Isabel saying "come on" as the kids headed for the other room, and then heard her say it again as they came back in, but to my surprise, it was James leading Isabel by the hand and Isabel hurrying to keep up as she continued saying "come on, come on". Maybe she is narrating for him. She's sticking up for herself, though, never fear. She said "Stop it, that hurts," when he pushed her to the wall, and says "turn, turn" when James has something she wants. James has, thankfully, decided against washing the dishes and has decided to read a book while Isabel slides her boat down the slide.This is the fourth day without naps. Why is it that children STOP napping when they're sick, just when they need it most?