Rolling: a reluctant ticky mark

Tammy has figured out how to roll. Meaning, she did it once back to tummy and a bunch of times tummy to back to victoriously get out of tummy time. She's not going to be crawling anytime soon if she continues like this. As I write this, she's looking up at me and chortling and waving her limbs about, surrounded by toys that her brothers have brought her. Incentive to move: zero. Looks like she's another one in our ongoing series of "gross motor skills are GROSS" children. (Has Rip ever jumped, much less with feet off the ground? No. He's so appalled by the suggestion, and just delivers an incredulous "No!" in response. Well.)