The right carry-on bag is a vital part of making a long trip on a plane as smooth as possible for you and your children. Most airlines allow one carry-on bag and one personal item for each passenger, so you can pack a small bag for each of your kids. But, packing for children adds a whole new dimension to the process. Here are a few tips on how to pack a smart carry-on for those long flights. . Don’t forget the travel necessities. Regardless of age (this means you mom and dad), it’s a s...