foods for brain development for 2+ yr boy

A. For good good mental development you should give a balanced diet having variety of food groups at least 2 serving of good protein like pulses beans egg soya , milk and Milk products, fish ,chicken, meat variety of seasonal fruits and vegetables and green leafy vegetables, especially vitamin A containing yellow orange green fruits and vegetables good fats providing Omega 3 for brain : Nuts like walnut, almond ,dry fruits, peanuts, flaxseed, lobia, fish