A week or so ago we knew it wouldn't be long... Addison wasn't walking, crawling, or sitting up on her own, but she loved holding our hands and walking everywhere.
Yesterday she learned to do a lot of things - crawl, go from laying down (belly and back) to sitting, and pulling herself up to standing from sitting. That's a lot in one day.
Since then, she is scooching all over, and after every nap she has sat up and waited for us to come get her. It's fun, but I guess we need to install child locks and cover all the wires!