My son, Dakota, was 3 1/2 yrs. old this past summer when we took several long car rides. Although he cannot read yet, he loves books and music. So what I did was get him his own cassette player with head phones, fisher price makes a durable one. I had him choose his favorite books, 5 or 6, I think, then I read them on tape, telling him when to turn the pages. This way he could look at the pictures of these familiar books and hear them too. He was so surprised to hear Mommy's voice on the radio! I also bought some kids music tapes that he could sing along with. This worked very well for us.
B. Brudon