Pack snacks with lasting value, something that will stick with you as the miles roll along. Toss some packages of string cheese in the cooler, put dry cereal or trail mix in containers, and fill plastic, sealable sandwich bags with baby carrots, celery sticks or apple slices. Add individual cartons of dip for the veggies and apple slices, and you've got a snack that will keep little hands and mouths busy. If you'd like to add an extra punch of protein, spread the apple slices or celery sticks with peanut butter. Raisins on top turn it into "ants on a log." Grapes are great little self-contained snacks and good thirst-quenchers, too. Sturdy cookies -- like oatmeal, or those old favorites, animal crackers -- also work well in the car. Just stay away from anything too crumbly or delicate.