30.

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Across
  1. 2. "Use your indoor voice!"
  2. 5. Indoor-outdoor event of a sort
  3. 6. Indoor or outdoor war game
  4. 9. Indoor or outdoor pets
  5. 10. "For indoor ___ only"
Down
  1. 1. They may be indoor or outdoor
  2. 3. Accustoms to indoor living
  3. 4. Indoor or outdoor emporium
  4. 7. Indoor-outdoor rooms
  5. 8. 400m in outdoor athletics, 200m indoor. (3)