yes is normal. does the sounds include "phlegm" and "snoring"?? if so, then is perfectly normal.usually the 'noise' will slowly go away by 6-8mths old, dont have to do anything, cos their nostril is still very narrow thus when they breathe, will have such sound. Some old ppl believe that these sounds are caused by phlegm which is NOT true. As for stretching, is normal too, even they stretch until the face become very very red and make weird sound, is also normal, dear son used to do that too. Lucky my pediatrician & family members told me is normal. haha..