Immunity in Children: As children grow, what they need is a balanced diet, rich in protein, vitamins, minerals, healthy fats, and carbohydrates to strengthen their immunity. When I used to ask our pediatrician about specific foods for my son while growing, he always used to emphasize, that make your child eat everything “healthy“. A combination of a healthy balanced diet provides us with a varied range of nutrition and this, in turn, maintains the normal immune function in kids and even in adults.