Teaching children healthy habits as early as possible helps them cultivate habits that they can practice through out their lives.
Those not losing weight with exercise could be so because of poor eating habits as well as psychological factors that negate benefits of exercise.
While liposuction & tummy tucks give a flat stomach immediately, these are not sustainable. This is because you are only treating the symptoms & not the root cause.
Most people start dying after the age of 40. Add life to your years by embracing exercise, keeping a healthy mind and being aware of your eating habits.