The list author says: "I have a son of 4 and I really think that it is unhealthy to prohibit him from gaming altogether. I am trying to pick best cooperative experiences so I could help him and teach him to work as a part of the team.
All these games can be played in a chunks up to 30 mins a day (it's his video game limit)."
"This is absolutely the best cooperative game for our scenario - you can help each other (i.e. carry), you can avoid life loss in a multiplayer game (you can hide in a bubble and drift back to other player) and my wife sometimes joins us in our sessions.
The bad thing is difficulty - my son got discouraged once we got to the last world."
"This is a game that will keep you occupied for a long time. It offers a very diverse experience and - best of all - allows players to build new levels and exchange them. You can play most levels either competitively or cooperatively and you can find levels of varying difficulty."
"Pros. (compared to NSMB): 1. It is much easier. You cannot "die" - you will only loose some treasure (like in Sonic) 2. Is targeting a younger audience - Kirby and his parter can turn in a lot of "fun things" 3. Everything is made of yarn = no violence.
Cons: 1. Not a game I would play alone - too easy and not as slick as NSMB. 2. No support for the 3rd player"
"This is not a game worth buying if everybody is over 6 years old. It still is a great asset to teach smaller children rules and tactics of hockey, basketball, dodgeball and volley ball. Up to 4 players can play together (I believe they all may play for a one team - I have only 3 players to try)"
"Great cooperative experience. Note: game is pretty tough so I suppose my son will quit after few more levels (he hates to always fail). The greatest thing in this game is that my son at last feels like second player has superior capabilities (Diddy Kong has a jet pack and a banana gun)"