If your kids or fellow passengers are car enthusiasts, a round of Find the Vehicle is a great way to pass the time during a road trip. You can play this game in a variety of ways: You could simply have passengers call out an interesting car model. Or ask them to search for a specific type of car, and reward points to the first person who spots it. To up the competition, specify a color or state license plate in addition to a make or model. The first person to find the car gets to choose the game's next make and model.