The battle against sleep

Does anyone understand exactly why kids - even tiny infants - fight sleep so hard? Here I am in the middle of the night feeding Ella "one more time" so she'll hopefully finally give in and go to sleep... so far, so good... but the real test comes when I put her in her bed. Meanwhile, until about 5 minutes ago, I was sitting on the floor rubbing Owen's back hoping he'll finally stay asleep this time. My kids are crazy! I hear stories about kids who go to bed at 7 or 8 and wake up the next morning... that's never been the case for us. Owen is just a late nighter and Ella just isn't on any schedule yet. It's tough since I love sleep so much and am ready to hit the hay around 10:30 every night. :) Guess we'll just have to keep working on it. Owen has been tired since about 9, but has been fighting sleep like the plague. He's also got a bit of a cold, so he's particularly fussy about it all. Hopefully now he's finally out for the night after a breathing treatment, Tylenol, a back rub and a lot of wishing from mom. :) Question now is... should I move him to his bed or leave him on his little couch in the middle of the living room? Hmm... I'll have to think on that one a bit more. :) Nighty night.