Is this what babies usually do before they go to full on crawling on their hands and knees? I ask this because DS1 was full on hands and knees when he started crawling so this is new to me. Also, he only seems to use one arm when he's 'army crawling' - his left arm. He'll army crawl, stop, get up on all fours, rock back and forth, and then plop down and army crawl again. It's the cutest thing ever and he just loves doing it. Just wanted to make sure that his gross motor is right on track. 








