I wanted to mention that my kids get unlimited TV/DVD time while we are driving in the car. We play solely educational videos in the car. They have learned so much. I buy DVDs, borrow them from the library, and from Netflix. My DS5 really likes the Getting Ahead in American History series, which is just lots of info for his age. We originally started with the Leap Frog series and have just progressed. My DS5 has learned multiplication, money, time, etc from it, and I just view it as bonus instructional time, which I don't have to teach. We have to be in the car anyways, especially since I live in LA.
