One may be content to continue scooting along on her tummy. Another may navigate by walking on both hands and feet, her bottom pointed toward the sky. And yet another may be able to master a route using her hands and knees. She can sit without support. She can get into a sitting position from her stomach.
Baby can pull up to a standing position from a seated one.
She walks by holding onto furniture. She looks for dropped objects. Baby shows unhappiness when you take something away. She plays peekaboo. All babies have their own internal developmental timetable.