The World Health Organization says that children need at least 1 gram of protein per kilogram body weight every day to meet protein needs for growth and development. This is why a source of protein is recommended for every meal and ideally in every snack. Try plant based proteins more often, including nuts and nut butters, seeds, pulses (peas, chickpeas, beans and lentils) and whole grains like quinoa. Other tasty proteins include eggs, yogurt, cheese, or lean meats like poultry and fish.