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4-6
Five preteens from diverse backgrounds train together at a local gym to prepare for a televised junior ninja competition in this high-interest series-starter. The stock characters are nevertheless relatable, and the brief backstories provided are intriguing. Details of the athletic competition keep the action rocketing forward, and the ending sets up forthcoming volumes. An interview with real-life American Ninja Warrior star Allyssa Beird adds authenticity and appeal.