Congrats on the weightloss! As for toning the tummy, after having 2 babies, I have done ALOT of research and what I found is the best and only way to tone and tighten is a combo of good diet, strength training and plenty of cardio. Since I buckled down and got serious about my workouts, it has done wonders. You are lucky to have youth on your side as well, so if you apply yourself, your should bounce back pretty quickly:)