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Calm Ninja experiences frustration and anxiety until he learns how to find his inner peace by finding his breath and practicing the Ninja Yoga Flow. He learns how to calm his worries and stay peaceful under extreme circumstances.Find out what happens in this comedic book about stress relief.?Life is hard! And it's even harder for children who are just trying to figure things out.The new children's book series, Ninja Life Hacks, was developed to help children learn valuable life skills.