Actually, this has four steps to it. I'm sure any child already taking lessons would not benefit from the first 2, but with the progression, it eventually teaches you how to read music, they just do it in a fun way. Steps 3 and 4 would probably benefit the advanced learner and make it more fun. This is really designed to do away with the teacher from day one since lessons are so expensive, and make it more fun than your teacher does also, but it does teach them the correct way to play.
If you think you know all the answers, it just means you haven't been asked all the questions.
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