There's a great, educational even, site that shows what 200 calories look like. Lots of different foods, in 200 calorie amounts. Man, peanut butter crackers, 39 grams make up 200 calories, compared to almost 1.5 kilograms of celery, half a kilogram of honeydew melon, 385 grams of apple!
And then, there's Why?
I would have more links here, but I'm at work :-). More later or tomorrow. Maybe.