9 month old son started crawling/pulling himself up in cot and since them he would not settle down and a nightmare child cries as soon as i try to leave him alone in his room but when i go in, he just wants to play and sit up, this we are trying to deal with but what's worse is when he tired himself out in the cot, he falls asleep sitting and as he hasn't worked out how to lie down,i have to go in and lie him down.
Can somebody suggest a method to teach him to lie down himself or will have to do this until he's 18???
Will this phase ever pass???