Picture of a children's water park in a gym

Quick answer：

A children's water park within a gym is typically a designated area equipped with various water-based play structures and features designed for children to enjoy in a safe and supervised environment. These parks may include slides, sprinklers, interactive water fountains, and small pools. Safety measures such as lifeguards, life-saving equipment, and barriers are usually in place to ensure the well-being of the young patrons. They are a popular feature in fitness centers, offering a family-friendly space alongside the gym's exercise facilities.