This little girl cannot sit still. If I sit her on the ground, she immediately moves to her hands and knees. She can't do much in that position, but oh, she wants to.
She rocks back and forth, and if she's motivated enough (i.e. if there's a remote or a cat nearby) she will lunge for it. She's also good at getting to where she wants to go using a complicated series of rolls, scoots, twists, and pivots. It's quite impressive.