I don't think there's any one challenge you face as a parent. I'm a New Zealander. Sr. Edward Hilary was a New Zealander, the guy who climbed Mt. Everest for the first time. Sometimes I think, although it sounds quite grandiose, sometimes it feels to me like Saturday night when I'm finally alone with my wife and the kids are in bed and the house is silent, it sometimes feels to me that during the week I've climbed Mt. Everest about 16 times, because in any one day you just don't know what's going to happen. Anything can happen. It could be accident emergency time. It could be absolute laughter until your coffee comes out your nose because of something ridiculous that happened in the back of the car. You just don't know. And so I think challenges, you've just got to be prepared to face anything and everything that could possibly happen.