I have a teenager who has always been underweight and needs to eat several snacks throughout the day in between meals to keep his weight up. My challenge is finding healthy snacks that he'll be interested in that will also help him gain weight. He gets bored with things like cheese and crackers or peanut butter sandwiches. When he arrives home after school completely starving, there's no way he'll go for fruit. He always wants stuff like chips and cookies and ice cream bars. I try different kinds of protein bars, but those get boring for him too. Any ideas for a boy who really needs to grow, and who'd rather have sugar-filled snacks?