Maneuvering

Jonah has reached a certain mastery of his gross motor skills, which allow him to sit unassisted for several minutes (though still with a pillow or person ready to catch him when he topples over), roll over (and back!) at will without fussing for help, and pivoting 360deg on his tummy so he can face in any direction.  Put all these movements together and he's still pretty stationary, but I am sometimes surprised to see that he's somehow maneuvered a couple feet in one direction through some very complex combination of rolls and turns!