Yogi baby

D is lying down on the bed while I'm fumbling with the diaper. "Help, help, help," she says. As I am about to put her diaper on, she lifts up her hips and tush into the air as if she's doing "bridge".
"Wow! Thanks!" I said. "That was a big help!"
She weighs about 28 lbs, 3 lbs less than her sister, who's 2 years older.