My Forrest did not crawl until after he learned to walk, right at a year. Now he's running, LOL! He rolled and "swam" using his head to pivot to get to something he could pull up on, then cruised. He could cruise all around the house by holding the walls and sidiling, like SpiderBoy, from about 10.5 months. Now, at 16months, he crawls around playing with toys, and loves crawling in and out of cabinets and big cardboard boxes. My DH never crawled either, and was a voracious reader in childhood (still is), and graduated #2 in our med school class!