maybe i was a lucky one but at 6 weeks i put a soft toy in the cot with DD and within no time she wouldnt sleep without it. She still has to have it to go to bed or whenever shes tired, upset, out of her comfort zone. she has added to it a blankie which she must also have, but the toy still stands strong. I just put it in the cot and left it there so whenever she was put down it was there and in time, she started to take it out with her after her sleeps, cart it around with her and ask for it if she felt she needed it.