My father has recently retired so he has a lot of spare time. Being capable of using the web and fluent in English I was thinking of creating a web application where he can be the operator.
I was thinking of web shop or a web brokerage where he can move the orders from the website to the provider.<p>Do you have any other ideas?
Your father may be retired but he's not yet braindead. He is a person, he has needs, friends, interests and he moves in a different circles to you. It would be in your interest to tap this information - find out what the pain points in his circles are and develop products for those.
As a rule of thumb older people tend to spend a lot of time and money on procuring chronic medication.
There are many other opportunities which you may not be aware of, but your father may be aware of.
Try that first...
Sounds like a great idea. Think its important he has a genuine interest in what it is he'll be doing, if possible. Maybe have your Dad note down all the things he finds clunky on the web for the next fortnight and build something to help him out, something he can have input in and use to help and sell to others.