Believe me, idc how bad your parents are, I had to call my network "Mom click here for Internet" just to be able to play a match of league of legends without an interruption.
I would buy my Parents anything that I can for under 300$, the only thing I would care about, is that it is easy to use, cause as I said, my parents are really bad at using modern technology.
If I would have to decide for something I would take a easy to use streaming box, or in general something that can play Netflix, cause they love watching many series. (My streaming box of choose would definitely be the NVIDIA Shield TV ( http://www.amazon.com/NVIDIA-SHIELD-Pro-Remote/dp/B013HK3YH0/ref=sr_1_5?ie=UTF8&qid=1449846453&sr=8-5&keywords=nvidia+shield+tv , in case the Amazon.de, so germany homepage opens, i am sorry, i tried half an hour to get the link to go to the American side ) , cause I could also game a bit when they are out of the house without buying a fricking overpriced Ps4 or a Xbox One).