I agree with Glynis...don't worry about his hands in his mouth and DON'T introduce a pacifier to replace it. My DS is 6 months old now and his hands are always in his mouth. No teeth yet; I figure he is getting ready. We are currently going through weaning him from his pacifier, and if you haven't started him on one already don't do it now. Look at it this way...if he needs sucking to fall asleep, he can always find his hands, but if you have to go in the middle of the night to replace his paci ... well, that gets old really quickly. HTH