My two-year-old is a great sleeper. It can take him a while to get to sleep after we put him to bed (what with all the singing and bear conversations that go on after we've left the room), but he will often sleep until eight o'clock in the morning: eleven or twelve hours.
The only minor issue with letting him sleep is that it interferes with naps: come nap time, he's not tired, so we often just power through the day and have him fall sleep really quickly in the evening. We're at the point now where letting him sleep longer and skip his nap is fine for everyone.
But this week, he's sick with a cough and cold. It's ten o'clock in the morning, and he's been in bed for more than fourteen hours. I know they say to never wake a sleeping baby, and he is sick, so my inclination is to let him sleep as much as he wants — but is there any good reason to wake him up and not let him sleep the day away?