Option For Shaping Up Post Partum?

A lot of mommies complain that their figures are no longer the same after having children. I am one of them. Although I did get back to my pre-pregnancy weight rather fast (about 3 months after giving birth -- even without any diet or exercise), my tummy still looks perpetually pregnant.

I wonder if Kettlebell workouts would help in getting me back into shape? It looks like it could, but this is all new for me so I hope somebody could tell me if this really works.