What are things you can do in a car to keep entertained on a long car ride?

I am going to Minnesota tomorrow and it takes Nine hours to get to the part that we r going to and i dont know wat to do in the car to entertain me...My mom got a new vehical and we no longer have a dvd player so we cant watch movies! I am tak ing my ipod, cell phone, and Nintendo D.S but is there any other suggestions on things i can bring or things i can do to saty entertained?