I would try every option before turning her around FF. DD is still very happily RF. A portable DVD player helps, but we only use it for long drives (over 2-3 hours). Other than that, she loves looking at soft books, or looking out the window and pointing things out to me. We talk alot about what we see out the window, or I'll turn on her favorite CD and sing along. Also, putting snacks into different containers entertains her very well. Figuring out how to get to the snack, and then eating it, and then putting the lid back on gives her something to do. We also try to schedule long drives around nap time, so she'll fall asleep in the car.