Swings, slides, climbing structures, mazes: The best outdoor playgrounds in Chicago let kids explore and use up that seemingly never-ending energy. (Chicago's unpredictable climate has also given rise to top-notch indoor playgrounds, thank god.) Our little ones tested out these top spots, from old-school (completely made of wood) to modern masterpieces to ones that have attached splash pads for when the mercury rises. With so many free, warm-weather options, who needs summer camp?
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