Tummy Time

I've been putting Sullivan on his tummy several times a day here lately.  I know you're supposed to do it anyway to help them practice holding their head up...but it also seems to help him with tummy troubles.  If I think he has a tummy ache, I put him on his tummy and that really seems to help.  He also naps well on his tummy too...but I don't dare let him nap for long like that...I find myself always checking to see if he's breathing well or that his face isn't buried when he's on his tummy.  He may end up and be a tummy sleeper...when he's a good bit older.