my neice is approaching four. she never learned to crawl, but was walking shortly after a year. i know some kids just do this. but i also know a bit about cross patterning and why that is important for development. she is having some issues, but i dotn want to lead anyone, so if you know about this topic, tell me what could become an issue for a non-crawler. after a few responses, i'll tell about our specific concerns. ty.