Childhood obesity presents significant health risks later in life. The Center for Disease Control (CDC) has determined that childhood obesity increases the risks of developing Heart disease, caused by: high cholesterol and/or high blood pressure Type 2 diabetes, Asthma, Sleep apnea and Social discrimination.

. Severely overweight children could experience significant health consequences and be at risk for even greater ones later in life.
Obese children need to get their weight gain under control without impeding their growth and development. The CDC recommends a proper diet of fruits and vegetables, low fat dairy and meat products in moderate portions. Oils, saturated fats and sweets should be consumed sparingly. Children need lots of water. Dietary changes should not be made without consulting a medical practitioner.
The CDC recommends that parents carefully monitor the calorie consumption of their children as make sure that children engage in enough regular exercise. Exercise strengthens bones, reduces blood pressure and stress, improves self esteem and helps with weight management. The CDC recommends children should receive at least 60 minutes of fairly intense physical activity several days a week. Parents should limit the amount of sedentary time their children spend each day.
http://www.cdc.gov/nccdphp/dnpa/healthyweight/children/