Healthy Afternoon Snack

I am going to start allowing the option of bringing a healthy afternoon snack. We have a very long afternoon and many of the students start to fade out by 2 oclock if ya know what I mean.
Examples: fruit, fruit snacks, goldfish crackers, teddy grams, Graham crackers, dry cereal, veggies, pretzels, granola bars, string cheese, yogurt, etc.