Roll20 is a browser-based gaming platform that can work great for long distance fathers and sons. It has my favorite, must-have feature for any system — ingame video chat!
The app helps you play dungeons and dragons, board games, table top games over the internet. Here is a snippet from their website:
Roll20 is a suite of easy-to-use digital tools that expand pen-and-paper gameplay. Whether you play online via our virtual tabletop or in person utilizing our character sheet and dice rolling application, Roll20 will save you time and help you focus on enhancing your favorite parts of tabletop gaming.
After over three years of consistent updates and surging past one million users, Roll20 has helped redefine the tabletop gaming hobby– but we’re not done yet.