Pediasure Complete Classic Vanilla 400 gm With the Sure3 System, PediaSure Complete provides complete and balanced nutrition for children ages 1 to 10 years old with feeding concerns. Some common examples of children who are hard to feed include: Eats very little. Very active but eats little Accepts only a few types of food. Highly selective in food intake Eats few fruits and vegetables. It can be used as a nutritional supplement with or between meals or as a sole source of nutrition.