different kids, different sleepers

Brennan went to bed at 8pm last night, but didn't fall asleep until about 8:45pm. Then woke up at 12:30 and was up until almost 2am. this morning he was nice and cheery, ready for the world at 5:45am, but snuggled with me till about 6:40. Campbell on the other hand, fell asleep about 10pm last night, woke briefly to eat 2 or 3 times, and at 9am is still SOUND asleep.