* Start with the basic Alphabet Game. Beginning with the letter "A," passengers work together to find each letter, in alphabetical order, on signs or license plates.
* Make it speedy. Try to make it through the alphabet before you reach your destination. On a long trip, see how far you can get in ten miles, or if you can make it through the alphabet twice before your next rest stop.
* Come up with some family rules. Make the game a little more challenging by calling license plates off-limits or requiring each letter to be found on separate signs.
* Create bigger challenges. Have kids who can read work through the alphabet backward or spell out their names, words, or sentences instead of just going through the alphabet in order.