My son is nearly 2. We co-slept until about a month ago when we put him into his own bed. The transition was unbelievably easy. Surprisingly so.
However, now he's waking at just before 5 every morning and won't go back to sleep. His room is pitch black. We live on the 6th floor at city centre so I doubt it's the morning chorus. Also, noise never wakes him during the night. I have actually dropped heavy things in his room (by mistake, obviously) when he's been sleeping and he hasn't even stirred.
So, any ideas what could be waking him?