Pad mini 9.3.5 update options?

I have my son's iPad mini he hasn't used it for a long time, and suggested installing press reader app so as he could look at magazines etc.  But couldn't install it as it needed ios 10 or above so no go!

So what are the options left apart from buying a newer model is it worth trying to jailbreak, to try and get updates or is that not worth the bother.

Or just try a restore and just use for basic stuff ie = trade me, nzherald, bbcnews etc.