its no fair, right?
but really, most kids get 9-12 hours of sleep. the want to go to bed late, but they get good sleep, hence the insane AM energy.
i do get up early sometimes, and once i get over the hump, its a great feeling. but imo, and ime, the only way to get used to it, is to go bed earlier 99% of the time. and even then its a bitch get out of bed early, even when i am reasonably well rested. ymmv.