The best time for children to eat walnuts is after the age of 5, the exact time varies from person to person. Walnuts are rich in protein, fat, carbohydrates and a variety of minerals, such as calcium, iron, phosphorus, etc. They have high nutritional value and can promote the growth and development of bones and teeth. In general, it is recommended that children around 5 years old can eat a little bit of walnuts appropriately. It is generally recommended to eat walnuts at breakfast or about 2 hours after meals, and 3-5 can be eaten every day. It helps to improve the nutritional ratio of children’s three meals. Among them, the protein contained in walnuts can promote the intellectual development of children, enhance memory; contains a large number of unsaturated fatty acids can promote intestinal peristalsis, prevention of constipation, especially suitable for the spleen and stomach weakness, long-term constipation of children. In addition, parents in the purchase of walnuts need to pay attention to the walnut kernel the more plump the better. The color of walnuts should be earthy yellow for the top, dark yellow for the second, tawny is more inferior. Always pay attention to the quality of walnuts.