My son is always hungry too. I try and add lots of carbs to my meals like garlic bread, dried biscuits or toast. You could also try smoothies for between meals, like frozen berries or bananas with milk. Sometimes I just give him chopped veggies like carrot or celery to snack on.
It's so easy pls try it, :) I have to boys in my life & it's the best, I was septic about how it would help me as well but now I have tried it my self it's a great investment for life changing, saving money & living the life we all deserve.