Bingo is a neat travel game, but you'll want to be sure to prepare for it before the trip begins. Bingo cards can be homemade or printed out for free from a variety of Web sites and they can feature lots of pictures of things that might be seen along the drive.
Some good examples are different types of road signs, vehicles, plants, animals, buildings and people. Once an item is spotted, players can cover it on their bingo card with a penny or other form of bingo marker. Cards can also be laminated or placed in Ziploc bags, and dry erase pens could work as good markers.
Bingo, like the other games on this list, serves a useful purpose beyond simple entertainment. It can also help lower the chances of car sickness because it keeps kids looking up and ahead to the horizon.