My son is 5 yr 10 months old ,he is very active but his weight is 16 kg .i am worried about his weight..tell how to improve his weight

A. Sweet potatoes: With just 0.1 grams of fat content and 86 calories per 100 gram, sweet potatoes provide nothing but good calories. This makes it a healthy food option for babies, especially if they are underweight. The high-calorie levels in sweet potatoes aid in weight gain and physical development in children.