I can't recall where I found this next idea at...most likely Pinterest. Its a DIY activity book for kids while flying (would also work for road trips). Just take a three ring binder, added some paper, coloring/activity pages (found randomly online, see below for the ones I found), stickers and tadaa!
I found the following activity and coloring pages here:The Frozen and Princess Packs are available at Over the Big Moon. (She has some other cool pre-K packs too!!).
I also made these little activity containers for while we are in Disney. My girls like to go go go, so I made several of these for when we go out to eat and need to wait for our food or if we need to take a rest. I saved my Crystal Light containers, printed off 1/2 sheets of coloring pages (http://www.colouring-page.org/), added a pack of crayons to each and in some of them I added s sheet or two of stickers.