Not only does my 8 month old not want to sleep through the night, but he won't nap either! He's a very happy baby, thankfully, but when I lay him down to nap, he will only sleep for about a half hour in his crib. Then at night, he will sleep for about three hours. After that, he wants mom. The only way I can ever get him to sleep well is when he is being held. Short of just letting him sit in his crib and cry, I don't know what to do with him.