Alternately, you could use a screen protector with a small circle cut out where the play button is, so your relative can feel it that way. Source: a video somewhere about (sighted) gamers who like having tactile controls on their video games.

This might not be helpful as it uses the headphone jack, but you can get physical buttons that plug into your headphone jack and you can program to a specific action. I haven't tried any, but I remember hearing about them. You can use this google search to try and find a good one:

https://www.google.com/search?q=headphone+jack+button&ie=utf-8&oe=utf-8&client=firefox-b-ab

There are locator dots that stick

use talk back.

to enable go to settings> accessibility > talk back. if you are on a samsung device running samsung experience 9 and android 8.0 or later it is called voice assistant. to enable go to settings> accessibility> vision> voice assistant then turn it on. i hope this helps.

Enable TalkBack on the tablet. It changes the way Android behaves.

Yes, the buttons are all properly labeled. No need for cutting screen protectors. No need to glue buttons. TalkBack lets blind people use tablets and phones by reading stuff back to you.

I don’t use android but did you know that it has its own screen reader? It’s called talkback. I’m not sure how accessible the app will be but even if it says button, that’s better than nothing, right?

For example: 1. You or the person turns on talkback.

2. Find the app and double tap on it.
3. You place your finger on the play button and talkback says button and you double tap.the book starts playing.

To stop it you flip the tab over, i think

I think you can label buttons too, i know you can with IOS and voiceover.

You may want to look into getting an Alexa device. All they’d have to do is say Alexa, play harry potter, for example and it should start playing.
You’d have to set it up but it might work for them better than this app.