Must have books when on long trips with kids!
Road trip in a box. I made this for our long road trip with the kids today. They open a new present each hour. Ideas from friends: puzzle maze books, craft kits, magnetic travel games, mini etch-a-sketches, snacks, new audiobooks or movies, face paint/wigs/mustaches, magnetic paper dolls, window decals, potholder looms, road bingo, lots of drawing stuff, a mixed CD of songs they haven't heard.
Road Trip Grab Bags - some great ideas here, but be creative - use them to come up with some of your own ideas. I like the idea of opening one bag an hour. That will shorten the trip!
bucket/pulley system for long car trips-awesome!