A week later and Jayce is cruising steadily, and perhaps most notable, happily behind his little walking thing. (Sorry, I'm sure there's an official name for the toy, I'm just feeling a little too lazy to google it. Though it may have taken about as much time as typing these sentences.)
He seems exclusively interested in standing or walking now as well, and is annoyed when we put him on his stomach to crawl. But with all of this newfound mobility, he's also learning a new word, no. And he is promptly ignoring it.