I'm thinking of getting it for my nieces as a belated xmas pressie (visiting them tomorrow) I think it's called Just Dance or something like that. My nieces are 4, 5 and 9, and the eldest two go to a dance school, do ballet, tap, modern etc so love dancing. The youngest loves dancing as well but just for fun. The questions I want to ask are would this game be ok for this age range? Their parents will be there supervising and helping with it so setting up isn't a problem, I just mean with the steps, how complicated they are. Also do you need a dance mat or can you just use the controllers? Any other info you can give me will be fantastic, thanks!!