Lily "Almost" Crawling

I have a frustrated baby. She wants to crawl SO BAD!  She knows the legs are supposed to do something. But how we do we make them work?  Watching her try is funny for us even though she is not thrilled with us. I mean we can do it. Why cant she?  I took a series of her "trying" a few days ago that just cracks me up. This was all in a matter of about a minute. It shouldnt be long and we are going to have a crawler on our hands! AHHHH! LOL ~Whitney