Even the best of us

I got a call from a client who had purchased a cheap MP3 player to plug into a kiddies car. He could not get it to work.
I got there, plugged in a headphone so I could hear it and plugged it into a PC and that saw it.
After a few minutes of prodding, I got something out of it. Bemused I looked for a manual, none (cheap import). So scratched my head. Then I saw a slight glow coming from the device, at this point I realised that the fake screen on the cheap import was actually a peel off vinyl label that was designed to look like a screen.
Peeled it off and there was a 1-inch display, thankfully in English.
Job done, simple solution