I would say there is absolutely nothing for you to worry about. He might be 'lazy' and every kid is different. My #1 walked at 10mth, by 1yr old he was already running. #2 walked at 11mth and now my #3 is 13mth, same as yours now - walked with us holding him 1 hand but refuse to walk or even crawl to us when he wanted something.
Read more