Calling All Pro Traveler's with Kids

For all you people that travel long distances with kids, I need your ideas on the best ways to keep CR occupied on our long trip to FL. He is so excited that I know we are going to hear "are we there yet?" at least 200 times and the already long trip is going to seem like eternity! So please...I am begging...send me some good ideas to keep him entertained so I will not be insane before we get there.