It is very important that your child gets the proper amount of calories and nutrients in order for him/her to function at an optimum level. The amount of calories and servings of food that your child needs every day is based on several factors; age, gender and activity level.
The more active your child is, the more calories he or she needs. Males generally need more than females and usually older children need more calories than younger children.
If your child is sick or has a medical condition, the calorie requirement can change so it is always best to seek professional advice in these situations either from a certified nutritionist or a medical doctor.