I love the classic snack of peanut butter and celery. I don't usually do the typical stuffing of peanut butter in the celery boat. I like to cut the celery rib lengthwise into sticks a few inches long, then dip them into crunchy peanut butter. It's a great snack because even though the peanut butter does contain quite a bit of fat, the protein helps make you feel full. And you can always use natural, low-sugar, or low-fat peanut butter. The best part is that celery is a negative calorie food. It doesn't get any better than that!