Crawling

Today I had Bradley down for some tummy time and he is showing some signs of mobility now! He started by shifting his upper body and then his legs until he turned 90 degrees on his play mat! I cant even believe that he is starting to do this since he really hasn't shown any interest in moving around on his belly yet. Instead of being proud of himself though he let me know right away that he was tired of tummy time and wanted to get picked up right away. I guess he had enough working out! Does this mean I need to get a baby gate?