Sarah crawled for the first time (not counting her backwards slide) on 7/7.  Here’s a video:

https://www.youtube.com/watch?v=Q-DiXGR4GFs

Here’s another video of her crawling two days later:

https://youtu.be/1K6Yu_F12D4

She’s crawling all over the place now, pulling things down from shelves, playing with cords, getting into trouble.