Learning to Crawl

I'm not sure if I should officially say Anna is crawling.  She certainly isn't doing it full speed ahead yet.  But every so often she gets all her movements coordinated, and I catch her crawling a little bit.  Last week, I took a few short videos (not great quality) of her learning to crawl.  It amazes me at just how much little ones learn in their first year to year and a half of life.