My kids are older now, but for years I made them a flexible 3 ring binder of a mixture (printable) trip diary, coloring pages, mazes, word searches, blank pages, including a 3 ring pencil pouch with colored pencils (dont melt in florida heat) , pencils, a self contained pencil sharpener and hole reinforcer circles. They have worked very well whether it be in the airport, plane, car or hotel room, they have kept them busy. The parks keep them plenty busy so no toys, but sometimes for toddlers small handheld characters for waterparks and their kids meals usually come in a bucket w/shovel.