Childhood obesity is a serious problem determined by body mass index that affects a child's health. Obese children have a shorter lifespan than healthy children due to increased risks of diseases. Many children are obese because schools serve unhealthy processed foods in lunches and snacks while providing limited exercise programs. Michelle Obama started the "Let's Move" campaign to address this issue by encouraging schools to offer nutritious meals and maintain recess. Schools must make lunches healthier, limit unhealthy snacks, and require daily exercise to help combat childhood obesity.