Wabi Sabi is a lovely japanese concept that means, as far as I understand it, imperfect beauty. It seems that this is a fitting idea to describe the state of a household with young children. Or maybe that's a complete mis-application, but hey, it makes me feel better.
Nothing is ever quite finished... or if and when a room or surface is cleaned up, it quickly goes back to a state of messiness. I used to think about this as kind of that scientific theory that everything always slips towards the direction of chaos, which really frustrated me. It is much pleasanter instead to embrace the notion of wabi sabi and enjoy the signs of life that our imperfect beauty reflect, right?