My DS is 4 months old and still sleeps in his carseat. We put him in there in the beginning because he would only sleep with the exhaust fan on so we put him in his carseat in the bathroom to comfort him/get him to fall asleep. Well, he no longer needs the fan, but we are stuck with the carseat. We have tried repeatedly to put him in the crib, but the instant his back hits the mattress, he wakes up and starts to cry. He will lay in his crib and play, he loves to watch his mobile and he LOVES his kick-n-play piano in the crib, but as for sleeping, no way. How can we get him to sleep in his crib, other than letting him cry himself to sleep-which I won't do!