[psandor]

Strange that I had to scroll down this far for this answer. Creating a normal, non-admin user for them will greatly limit the damage they can do as they won't be able to make system-wide changes. I also disabled installing extensions in Edge.

[blackoil]

I would never recommend something like iPad. I feel psychologically it makes you a passive consumer, while something like Mac/Win is more action oriented.

[nemomarx]

Is that a problem for the elderly?

[elchief]

do your parents write a lot of code?