A.D.
My daughter at that age was an only child and did not play by herself. She had an open top tote next to her in the car with some "quiet" battery operated toys (like pretend phones), stuffed animal and stuff that played music. Otherwise- I talked with her, we sang songs (music is her thing) and she slept or napped. For the long long trips- I def. have heard that leaving with the kids so they sleep in the car- is the best way to go. Your child may surprise you and enjoy looking out the window. We use to get her to look at the moon, sang songs about the moon and tell her it was following us home.