Clif Kid ZBars. First, I tried them out at home on my two subjects. From Amazon, I ordered a Clif Kid ZBar variety pack which includes 8 Chocolate Brownie, 8 Chocolate Chip and 8 Honey Graham bars. The boys (and their parents) liked all three varieties. Success! Since we're gluttons, we ended up eating the entire variety pack before we left on our trip. I ordered two more variety packs and kept them under lock and key until we left.
Since the bars have vitamins and minerals, whole grains, no artificial ingredients, no high fructose corn syrup or trans fats, I felt good about the boys eating them. They just thought they were getting a treat.