I would like a remote for the computer (like a TV remote), but I don't know where to get one. Does anyone have one, and where did you get it?

My family watches alot of TV online, but my parents don’t like food getting near the computer, so we always have to have somebody get up to control it. A remote would make it so much easier. Does such a thing exist? If you have one, how much did it cost? Was it easy to set up? I would rather get suggestions from people that already have one than from somebody just googling it.