So far I've played the "basic" version several times and we had six people playing. Ages were 7, 30s, 60s, and 90s (huge age gap!). Everyone had fun! Took the 7 year old a whole game to really understand the how to use the different gears, but had more fun on the second round. All the adults enjoyed it too. Can see this game being less fun with less people, but I haven't tried it yet. Key point is to stress thinking about what you're going to do on your turn between turns to ensure the game doesn't bog down.