My son is 21 months. He sleeps in his cot and hasn't tried to climb out or anything just yet. But he's started to stir and wake up at night. I know he's still really young etc. But he's in a great routine and usually sleeps right through. He's got a night light and an Ollie Owl that we keep on the white noise setting. Because we've done that since birth. Someone suggested that maybe he's old enough to have a pillow and duvet? I still use the sleeping bags, which I've always felt more comfortable with. But do you think he's old enough for a pillow? What age did you all switch over? Thanks.