I like to think we are pretty creative with our games for the car. Joey and I had 3 summers of trips to/from camp everyday - and especially on the way home, he liked to play games. Actually, on long car trips - Thomas and I like to play games too. =) It started out with a trick I learned from my parents. Bring the box of cards from a trivia game along in the car - ask each other questions to pass the time. We would compete to see who could get the most questions right on the Trivial Pursuit card. Once on a trip - Thomas and I brought along some Tribond cards - which was all well and good, but we eventually started making up our own trying to stump the other person. Joey has come to really enjoy this game too - and as he's gotten older, and his vocabulary has expanded - does quite well.
Since it is not the "actual" game mentioned above - we generally call it something like "take 3" - but the premise is the same - you list three words, that all have a connection to the same single word -- for example:
The answer is "Sesame" -- Sesame Street, Open Sesame, and Sesame Seed.
Since it's a verbal game, Homonyms are allowed -- for example:
The answer is "Fair" (fare, Faire)
Here are a few others we've come up with - You'll have to try to come up with the answers!