Educational Car games
We were inventing new games to play in the car. We started with a classic - the first person picks a word and subsequent players try to keep the sentence going. We had one little problem, Matthew didn't really want to play.
The game started with Emily and went as follows:
Emily: "The"
Matthew: "End."
And thus it ended, with much hilarity.
But we did discover yet another game, perfect for 3rd graders. First person starts with a digit and each person appends another digit and then says the resulting number. Getting to six digits would be quite the accomplishment for third graders.