The following are some brain-building foods suitable for children:

1. Fish: rich in protein, unsaturated fatty acids and multivitamins, which helps promote brain development and Improve intelligence. For example salmon, cod, etc.

2. Nuts: such as walnuts, almonds, peanuts, etc., are rich in unsaturated fatty acids, vitamin E, zinc and other nutrients, which help protect the nervous system and improve memory.

3. Eggs: Rich in protein, vitamins A, D and B vitamins, which help promote brain development and maintain healthy skin and vision.

4. Green leafy vegetables: such as spinach, rape, mustard, etc., are rich in nutrients such as vitamin C, folic acid and potassium, which help improve immunity and prevent anemia.

5. Fruits: such as blueberries, strawberries, oranges, etc., are rich in antioxidants and vitamin C, which help protect the nervous system and improve immunity.

6. Whole grain foods: such as oats, brown rice, whole wheat bread, etc., are rich in complex carbohydrates, dietary fiber and B vitamins, which help provide long-lasting energy and maintain a healthy digestive system.