I think that that might be a little young. However, it really depends on how developed the child's hand - eye coordination and moter skills are. Also, there is a fair amount strategy involved in order to progress through the levels. So, some degree of patience is required and the ability to think ahead in order to really enjoy playing the game. So, again it will depend on the child's level of maturity more than just her chronological age.
Well I haven't played none of them but my 7 year old son loves all of them but plays generations a lot more than them two but he hates that's its only one player and that he can't save where his levels when has to get off he has to start all over each time..hope this helps u
My son uses this game on his Xbox and doesn't have a gold live account. I would say that one would be needed if you wanted to post your achievements online for others to see. Something like a leadership board. Hope this helps you.