...not yet
She flaps her arms and legs constantly and rolls occasionally.
Yesterday, we had dinner with some friends whose daughter is Leah's age.
She crawled like an expert, maneuvered herself up the one stair separating the living room and the dining room and back down again. She pushed a "walking" toy around as she cruised like she'd been doing it her entire life.
Leah watched her with a very perplexed look trying to figure it out.

So today while we were at the store I bought this for Leah.

It was on clearance, and it said "encourages crawling."
I have pictures of me with a
similar toy, and I seemed to like it.
Well, it scared her. I have never seen her so frightened before. I picked her up, and we did something else for a few hours. I thought if I tried again with her laying on her stomach, she might like it more. She moved this time. She was frantically trying to move in the other direction. When she couldn't get away, she cried again.
I guess she's afraid of cows in cowboy hats.