I wanted to bump this thread to thank Jackie for talking about how much fun Zoo Tycoon is. Santa brought the xbox version for Swimmy for Christmas, and she loves it. I like how she can play it in creative mode, but it can be super detailed and challenging if you want it to be. (I don't mean to imply that it's a game for 8yr olds, it seems to be good for ages 8-80)
Maybe if she quits getting in trouble at school, some day she'll get to play again.