Way back in 1983 (I was 11) my father bought the basic rules for Dungeons & Dragons (the red books). He created a campaign in a kingdom that he had made up, and made stories about, from when he was a kid (1950's). My mother, sister and I all rolled up characters. I was a wizard, loving the idea of magic and all that, and we started wandering through that kingdom, fighting against the evil Agra Unistra, a witch that was trying to subvert it.
What was awesome is that Dad drew out a full hex-map that covered the table. Though the map is gone today, I still remember the layout of the main river that ran up to the city where we were, the hills and mountains around. I am now working on writing a story that takes place in that land, only thousands of years later. I have drawn my own map table-sized hex map, and I have enough plots/events/characters from my story, I am going to start using it for my own D&D campaign, and my children can run through a land my dad made up long ago.
Mom and Dad now live 500 miles away, but one of these days I hope to get them to roll up new characters, and test out 5e. With roll20, Teamspeak etc distance doesn't stop people from playing together like it used to :)