Parents need to know that Beatstar is a music game for iOS and Andriod devices. Kids can potentially make some purchases for the game -- such as gem packages for $0.99 to $99.99 -- but can also play for free. Missing a beat can slow their overall progress down, but they can keep going without having to spend real-world money or waiting for anything to replenish. Some elements can be a bit confusing at first, such as the different types of currency and the Journey, which is essentially, a roadmap to see where you are in the game. But a tutorial explains the gameplay well, and kids should be able to figure most other aspects out as they play.