Wii is full family entertainer from kids to adults... the mario range of games, mario kart, super mario galaxy etc....
one downpart is the the games are expensive, but rejoice the games you can also download online and store on your wii for just a price of 10 euros, where the CD version costs you 50 to 70 euros. these games reside in the Wii memory and can also be copied onto SD card as backup.

so start downloading the games. be careful when trying to mod the Wii, as when u allow it to upgrade online the unit might ger bricked.. so careful...