Gamecube Games for a 6 year old?

[pooter]

I'm getting my 6 and 4 year old nephews a Gamecube and a couple of games for their upcoming birthdays. Anyone have any suggestions for games that would be appropriate for them? I have no idea what a 6 year old is capable of. :) Right now I'm thinking of Super Monkey Ball.

[Crow]

Hmmm, for a 6 year old I'd say check out Animal Crossing. It's a great game for all ages and you can play along with them and enjoy it just as much as they will. Check out some player reviews at GameFAQs.com and visit the message board there. Here is a great review from a friend of mine. It describes the game very well.
http://www.gamefaqs.com/console/gamecube/review/R40569.html

I have had this game since last October, and still play it almost every day.