My daughter will be 10 months this Sunday and seems to have no interest in crawling, pulling up, etc. she seems completely content sitting and playing with toys. If we try to put her in a crawling position she will lay down and if we put her on her belly she gets upset and rolls over. I know not all babies crawl but she doesn't seem to want to be pulling up to standing at all either. She will stand holding on to something if we're behind her but I think she's scared. Is anyone else experiencing this?