Life hacks for long car trips?

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The original was posted on /r/lifehacks by /u/Wisteria_Dragon_04 on 2023-06-26 15:59:35+00:00.

Any hacks are great. But specifically for me, I’m carpooling with my fairly large immediate family in our van to go visit some extended family. The car ride is going to be about 9 hours and one of the passengers is 2.