There are guidelines for setting serving portions for children . Children always ask for larger portions, second or even third helpings of the foods they like the most. Unfortunately, most of those foods are the foods that are higher in fat and sugar content since children are driven by taste. To assure that your child get their nutritional needs met at the lunch or dinner table and that they do not over eat simply because the food tastes good, it is important to monitor portion sizes.
Put everything you will be serving for lunch or dinner into individual serving bowls or serving platters and put them on the table. This makes it easier to serve your child the right portion size. Read more here.