After about half an hour, he said :"How do you know what's going on?". Ex-That Guy said, after five seconds of silence, "You just imagine it in your head". "But what if someone else is imagining it different than you?", he asked again. A different friend answered this time, "That's the point. If you ask two people to imagine a city, they will imagine different cities. They will still see the same thing [a city - this makes much more sense in my language, trust me], but the details will be different - we imagine the same thing, but the details are different.". That's when the kid said the magic words :"Can I play as well?". I asked what kind of character he wanted to play. He said what are his options. I told him he can pick whatever he wanted. After a while, he settled for a concept - he'd be a Dwarf Fighter (The rest of the party was a half-elf Warlock, a human bard and a halfling rogue), son of the colonial village's blacksmith, whose father became a drunk after having his wife killed by the natives. I got a bit worried then that this would turn into a wild escapism party in which he'd go batshit crazy at everything he hated, but it was far from that. The character himself didn't speak a lot and loved music and quickly became friends with the bard. The kid got the idea of his character being a separate thing from himself as a person pretty quickly and when it was late enough for him to leave (we only did one encounter with him, character creation took a while), he asked if he could come tomorrow again. We told him sure, and he could come here any day he wanted for the two weeks.