Have you seen Trunki? It’s a genius carry on piece of luggage for kids (approved carry on size). You can ride on it, pull it or carry it on! Your child can ride it around the airport while they are bored waiting at the gate for the flight. It is great for storing travel essentials. Plus kids like having their own bag that they are responsible for pulling around.
Trunkies come in several colors and are available at several stores for about $30.