Infants aged 8.7 to 12.4 months were encouraged to crawl on various surfaces, including tatami mats (a straw mat tradition in Japanese floor covering), hardwood, carpet, and joint mats.

Most babies learn to crawl between 6 and 10 months. But some children never crawl, instead opting for bottom shuffling, slithering on their stomach, or moving directly to pulling up, standing, and ...

While typical babies start crawling between 7-10 month s of age, some opt to scoot around on their bottoms, roll from place to place, or even crab walk. Some skip crawling altogether.