A lot of the babies I have known don't crawl until 9 months, which is completely normal. That is actually the average age. Some are younger, and make mothers think their kids should do it too, but 9 months is average so I wouldn't worry. My son seemed to have no interest... and then one day at about 9 months old he suddenly did it. From 7 months I kept thinking he was about to do it, and he never did. He will do it on his own time, and that is the best way to do it. Rushing him to do things earlier will only cause him to get stressed out, and maybe even end up doing it later instead. Most kids also start walking between 12 and 15 months, with 13 months being the most common. Almost every child I have known in the last 3 years (after working in a daycare center and being a nanny) has walked around 13 months. My son was 13 months 1 week... on his first birthday he took 5 steps... and then for a month he didn't even want to stand up... crawling was faster and he wanted to get places, so he wouldn't even take the time to try to walk. Then one day he surprised me (and someone I just got done telling he refused to walk) and walked across a room... and never stopped. I wouldn't worry too much about those things... they all do it in their own time, and I have learned it is better if they are later anyway. My cousins daugther walked at 10 months... but never crawled much, and she would walk right off of things and not understand to climb up or down off the couch. My son who crawled longer learned those things sooner because he was crawling and climbing on things instead of walking. He could crawl up and down the stairs at 10 months (I always stayed with him, but he loved to do it), and my cousins daughter didn't understand about falling down them until 18 months because she never took the time to climb on things. So that really doesn't mean much about how they will develop later.