Daxter. It’s adorable and easy to play.

1-Secret Agent Clank
2-any sports game (NBA 09 The Inside, Madden 09, etc.)
3- Patapon (number 2 will come out soon)
4-LocoRocco (number 2 will come out soon)
5- Star wars Unleashed
6-Lego Batman
7-Lego Indiana Jones
8-God of War (may be a little too violent)
9- Daxter
but since you are getting the game for an 8 year old i really suggest numbers : 1,4,5,6, 9 and possibly 7

football manager 2009