Most children need time to eat their breakfast they do not like being rushed it is an important meal for him to eat, cereal /yoghort /fruit is good. set the clock earler so he has time to eat his food. I think a whole meal brown sandwich or roll is nourishing for lunch maybe some cheese or tuna in it , crackers, apple, banana...evening meal...rice and veg, spaghetti and meatballs .fish sticks and a few french fries , chicken nuggetts , bowl of thick soup,with bread, especially in winter, so warming ...Many economical stores out there now with everyone feeling the pinch,Good Luck .