DSD got a leapster for Christmas and plays it constantly (in the car). I want to get her a new game for it for our really long car ride to Disney World next month. I was going to get the princess one, but I am concerned that it will be too easy for her. She will be finished with kindergarten next week and is already doing really well with reading. I was also considering animal genius or I spy. Anyone have any feedback on any of these?