No matter how many ab exercises you do, it won't show until the layer of fat is gone. Crunches and flutter kicks may give you six pack and but they won't show. Cardio helps burn fat and will remove that layer right off your belly. Anything that can get you heart pumping is cardio so make it fun! Dance fast to an upbeat song. Do jumping jacks. Run in place or just run. Look up at home cardio workouts for some fun ideas. Zumba is a great cardio workout.
Hii! You should do some exercise, go for a run sometimes and you can do some sit ups and exercises like that :)