on a roll

Oliver is still getting up every 2-3 hours at night. My reward at his 4am feeding today was to find him on his tummy. Thus far, he's displayed very limited interest in rolling over. He rolled from tummy to back once a few weeks ago, but not again since then. To my knowledge, until very early this morning he had never rolled completely from back to tummy. Then he did it again this afternoon during a nap, landing at an end of the crib he doesn't usually visit. I can't tell if it's waking him up or not, since he's often awake at 4am. Maybe I'll find out tonight. I have a feeling I'll be up.