Just wanted to share my project I knocked up using a USB flash drive, a cheap Waveshare clone 3.5" TFT touch-screen and a Raspberry Pi 3B. Although I remixed the case to make it fit my needs, the initial work was done by someone else. It’s an audio-book player for my son and after tweaking the UI a bit to make it child/finger friendly it works brilliantly. It’s all made using pieces I already had lying around, so the only cost to me was some filament!
I’m currently using an x-mini mini speaker plugged into it as it’s just for audio-books, but I may end up building upon this to add a base with a little amp and speakers built into it.
I tried using Peppy at first, but it just did not work well and kept freezing and I’m really pleased I switched to Volumio.
There are loads of photos on my make on Thingiverse, so I thought I’d post the link rather than all the images here!