How to Explain TTRPGs to Someone Who Has Never Played
Do not say "it is like a video game but with more freedom." Say "it is like telling a story together, where dice decide what happens when you try something risky."
The wrong way: "It is a game where you create a character with ability scores and proficiencies, and the DM narrates the world while you make decisions based on your character's motivations, and combat is resolved through..." — their eyes glazed over at "ability scores." The right way: "We tell a story together. You play one character. I play everyone else. When your character tries something risky, we roll dice to see what happens. It is like a board game where you can try anything you can imagine." Start there. Rules come later.
The single best introduction is to hand them a pre-generated character and start playing within five minutes. Do not explain the rules. Tell them "you are a dwarf fighter named Borin. You are standing at the entrance to a goblin cave. Torchlight flickers from within. What do you do?" They learn the rules by playing, not by listening. This is how the Red Box taught a generation in the 80s, and it still works.
Best Systems for Kids (Ages 6-15)
Hero Kids (6-10). No Thank You Evil (8-12). Mausritter (10+). D&D Starter Set (12+).
Hero Kids is the best entry point for ages 6-10. Combat uses opposed d6 rolls (no modifiers, no arithmetic), characters are defined by a single special ability, and adventures take 30-45 minutes. No Thank You Evil! (Cypher System for kids) lets children invent their character concept ("I am a Sparkly Robot Princess who is really good at jumping") and the system handles it mechanically.
For ages 10+: Mausritter (mice with swords) is brilliant because the physical inventory system makes mechanics tangible. For ages 12+: the D&D 5e Starter Set (Lost Mine of Phandelver or Dragons of Stormwreck Isle) is the gold standard. Pre-generated characters, a clear adventure structure, and a DM booklet that teaches you to DM as you go. The community consensus: start with a Starter Set, not the core rulebooks.
Running the First Session for Adults
Pre-generated characters. A 2-hour one-shot. A clear goal. No rule explanations until the moment they are needed.
For adults who have never played: a full character creation session is a great way to lose them before the game starts. Use pre-generated characters. Run a tight 2-hour one-shot with a clear goal (rescue the blacksmith's daughter from goblins). Explain rules only when they come up ("you want to climb the wall? roll a d20 and add the number next to Athletics"). After the session, if they are interested, schedule a proper session zero for the campaign.
The most common mistake experienced DMs make with new players: overexplaining. You want them to understand the tactical depth of the system, all the options available to them, the lore of your world. They just want to know if they can talk to the goblin or hit it. Answer that question first. Depth comes later. The goal of a first session is not "they understand the rules" — it is "they want to play again."