You're twelve years old on Thanksgiving at six thirty in the morning. You'll be leaving for Grandma's in about a half hour, and she's lives a three hour drive away, going in one direction. You have nothing to prepare yourself on this journey, other than a tablet running Android Eleven. Beware, the speaker is broken and there is no headphone jack. Google Play complains that the device isn't certified or whatever, but that isn't going to stop you from downloading apps from third party websites using the family computer. Plus, you have one great advantage: F-droid is installed and ready to rock.
You must hurry, because you wont have an internet connection once you hit the road. Quick, what apps do you install? You have 128GiB's at your disposal.
A tablet, you say? Seems like a good reason to finally try Unciv.
And maybe Organic Maps if the driver needs help navigating.
Unciv works perfectly fine on a phone if you feel like risking significant amounts of your time (:
I found it uncomfortable on my phone's small screen.
A much more mobile-friendly 4X game is Polytopia. Doesn't look like it's on F-Droid but the apk is available: https://www.apkmirror.com/apk/midjiwan-ab/the-battle-of-polytopia/