Yesterday Leia figured out how to move. She ended up moving a couple of meters by frog hopping across the floor. Her main goal was to reach a cardboard box that was way out of reach. Usually we keep all paper objects away from her because she just tries to eat them (and usually succeeds in eating small parts of them.) This time we let her chew for a while on the box as a reward for her hard work. Also, given that it was a relatively sturdy box it didn't come apart even when drenched in her saliva, so it was a bit safer.
It looks like the crawling lessons earlier in the day worked.