Have you lot discovered Hanabi yet? I'd strongly recommend it — a collaborative card game.

One of the few criticisms I've seen levelled at Pandemic is that it is in effect multi-player solitaire: one player with a forceful personality can run the game for everyone. (I guess this is possibly an advantage with young children, because you can help them as much as necessary.) Hanabi fixes that, though, by the simple expedient of having hidden information.