Zadie's Night Time Activities

Both girls have been sleeping at night for 8-10 hours consistently since Christmas. Lately, we've noticed that Lia tends to shift ever so slightly in bed at night--she moves up and a bit diagonally. Zadie had been our stationary sleeper until the other night when we walked in to find that she had completely rotated 180 degrees in her crib. She began with her head under the mobile and woke up with feet under the mobile. Who knows what they do at night, but we won't complain because its allowing us to sleep.