How to keep entertained on a car ride?

Pretty soon, I'm going on a 12 hour car ride to visit my family. I was wondering what I could bring that would keep me busy? I'm a 15 year old girl if it helps. I have an Iphone, but I don't want to use up all my data.

You can txt your friends if you have any siblings, talk to them or play a game with them and I know that food always helps or bring a portable DVD player

Read books

I want to say use a small vibrator massager to sooth your neck muscles.

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