DD is 11 weeks, and in the last week or so, she's been discovering that she has more control over her body. She rolled for the first time, has been holding her head up while on her belly for much longer durations, and exploring her hands and feet far more often.

However, she has also been, for lack of a better term, "planking" her body. She has been doing it when feeding, getting a diaper change, or simply just chilling on her activity mat. She just becomes stiff as a board and extends her limbs straight and firm. Sometimes, I'll walk her across the room, and it is as if I'm carrying a smiling 2x4. She eventually relaxes and bends her body, but it's slightly odd.

What the heck is she doing and should I be at all concerned?