are kids getting enough exercise?

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Across
  1. 3. an institution for educating children
  2. 5. an activity that requires physical effort and often improves health and fitness
  3. 6. a room with equipment for doing physical exercise
Down
  1. 1. (of a young person) in the process of developing from a child into an adult
  2. 2. education gym but outside
  3. 4. a young human being below the age of 18