tetris party on wii ware
a ton of VC options (check my profile)
resident evil 4 (for urself)
mario kart
lego starwars
zack and wiki
super mario galaxy
excite truck
maybe some of the cartoon (nickelodeon) based games
de blob
samba de amigo
mario party 8
wii play for $10 when you get extra controller is great. My 5/6 yr olds love it.
I guess that is a good list.