My mom (85) has been using Xubuntu for some 10 years now. She uses Facebook and Gmail and plays card and puzzle games. She had no prior contact with computers, and learned it mostly by herself.
Just give thema stable solid distro. It will make their and your life easier.
Rat Race, The Big Lebowski, The Blues Brothers, Mars Attacks, Constantine, any Riddick, any Resident Evil, any Alien, any Matrix, any Predator, Equilibrium, Gattaca, District 9, and a lot of others I can’t remember at the moment because I’m quite drunk.