It depends on what you define 'appropriate' for kids. In terms of them wanting money for the really cool stuff, I'd say it's on the fence. I don't think they should be putting this in a game designed for kids. I've played this game before a while back, and I had to stop because they seem to only care about money. It's okay to have some real money involved, but this game goes over the top with that. I couldn't get very far because everything I wanted always seemed to cost real money. I don't see how anyone, even a kid, can enjoy this game without asking their parents to invest every dime into it for their child to play.