Entertain Your Child With Your iPhone

It seems as though almost every evening I drive behind an SUV that has a DVD playing to entertain the kids in the back seat while mom or dad are driving around town. It sounds like a nice way to keep the kids occupied, but what if your car doesn’t come equipped with a DVD player? You could buy children books on CD or borrow them from a library to play in the car, but what to do when you forget to get a CD?