What can i do to flatten my belly and get thinner thighs?

Lots of hard work: Unfortunately it is not possible to create regional fat loss by any method. Best bet is nutritional diet with aerobic exercise. Later add a targeted weight program to sculpt the specific muscles needed to shape you.

Lose weight: For flatter abdomen eat healthy & get physically active. Calories burned > calories consumed. To tighten ab's: crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge & “bicycling” exercise on back. Engage in regular aerobic exercise (i.e. running, swimming, Nordic track, bicycling, kickboxing, walking, cross country skiing, hiking, etc.)