Doesn't he look like Pooh with his head in his honey pot?
I like to call this next move the crab crawl (or the Linda Blair, depending on your movie taste!)
We start on our tummy.....Then on our side.....Reach back and get foot up under us........All the way back.......And PUSH with the foot to move forward an inch or so!!!! Then start all over again. Soon you will be right where you want to be, next to mommy! This is the funniest thing ever. I laughed at him trying so hard to get to me. And he did!