He started taking a couple tentative steps at a time, then about a week ago, he realized the benefits of using his legs to get around. His gait is quite awkward - my Dad describes it as flopping his feet down like dead fish - but gets a little smoother each day.
I put him down at the store this week, and he made a break for it! I had to really stay on top of him to make sure he didn't get away. He is definitely loving practicing his new skills.