That’s a good idea too. All depends on how much freedom the parent wants to give the child.

Yes. I used to give my old phones to my kids for entertainment. Nowadays it seems like music videos are as prevalent as mp3s, so you need a decent display as well.

How about using an older smartphone with the SIM card pulled out? Delete/hide all apps except the one for music and lock down the app store.

As others have responded, your joint pains are not normal. Yes, I had joint and muscle pains in my 20s, but it was always obvious how I got them and they eventually healed after several days.

When I was 55, my fingers started swelling and I was unable to perform simple tasks. My doctor ordered a series of blood tests, CBC (Complete Blood Count), CMP (Comprehensive Metabolic Panel), Rheumatoid factor, Lyme disease (there are 2 tests for this), plus others that I can’t recall off the top of my head. I was eventually diagnosed with rheumatoid arthritis.

You should find a doctor who won’t ignore your symptoms.