Am I Learning To Crawl Or Just Showing Off My Butt??

I enjoy pushing my butt up with my legs whenever I'm tummy down and mummy has a feeling that maybe I'm learning how to crawl. And at times, it looks like I'm just showing off my butt cos only my lower part of the body is pointing up and also I still don't know how to use my arms to move forward yet. And mummy loves my butt so much that she will try to grab hold of my butt whenever she saw my butt pointing up. =)