There's an amusing video on YouTube called Buddy's Baby Crawling School. Buddy in this case is a DOG . . . he's on the floor with a baby girl, who looks like she's trying to move around. But basically she just flaps her arms and legs.
So buddy gets down beside her and demonstrates his crawling technique . . . he even drags his legs behind him like a person learning to crawl would. (He does it at :20, and again in part 2.)