Our little blade of grass

Quinn obviously can't walk yet. He can't even crawl. But somehow he manages to move. It's almost imperceptible - much like a blade of grass, if you watch intently he (or the blade of grass) doesn't appear to move (or grow) but then some span of time later he's in a slightly different spot (or the grass is taller). He does it in bed as he migrates in pursuit of Rebecca. He did it tonight while lying on a blanket on the floor. We looked back at one point and he had rotated almost 180 degrees, pivoting on his huge melon. I don't think it's any known form of propulsion - it's not bipedal, or on all fours, or a snake-like motion, or crawling, or bouncing. It's sort of a collection of a thousand tiny wiggles but with the average over time propelling him in a direction that really looks like his choosing. It's really quite amazing. I've never had so much fun watching the grass grow.