When women get a tummy tuck or mini tummy tuck after having children the surgeon does two things: remove the fat and tighten the muscle. When you have a baby those muscles get stretched out. To remove fat eat clean and talk to a dr or dietitian about how many calories you should consume to lose weight and stay healthy, or use an app like Noom or MyFitnessPal or Weight Watchers. Do cardio at least 3 days each week for no less than 10 mins. To tighten, do core exercises like pilates, kickboxing, dance... I'm sure there's tons, with moves that target your lower abs. Do reverse crunches, leg lifts, hip raises, L-pulls, sit ups, plank. Lie on an incline bench and perform a leg lift. When your body makes an L do a hip raise and curl your abs slightly so your feet move closer to your head. Pulse there twice, then lower your hips and then lower your legs for 1 rep. Do 3 sets of 15 reps or whatever you can finish but is challenging. Lie flat on your back and hold a stability ball between your legs lift your legs and arms and pass the ball from one to the other and lay back flat. Lift your arms and legs again and pass the ball from your hands to your feet and lower. That's 1, do 3x15. Hope this helps!!