My son has been extending his afternoon nap. Recently he’ll hit 5:00 before waking up. My daughter used to do this with no problems. She would wake up, eat dinner, have a bath, and then sleep for the entire night. He, on the other hand, is a major grumpy pants when he wakes up from one of these late naps. I wonder what he is working on to make him sleep so long and be so grumpy. Language, motor control, height, teeth? I am sure we will know in a week.