Luke on hands and knees

Luke turned 7 months old on January 26th and by this time was getting pretty good at pushing himself up on his hands and knees, and even getting his toes underneath him and pushing himself into a "downward-facing dog" position.  He was turning himself around in a circle and sort of inching along, but wasn't very mobile yet.  He was also sitting up by himself very well and grinning a lot. No teeth yet though!