Fun crossword

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Across
  1. 2. what type of key swings from free to tree?
  2. 4. enjoyment, amusement, or light-hearted pleasure.
  3. 6. easily understood or done; presenting no difficulty.
  4. 7. what type of how cannot be tied?
Down
  1. 1. a weapon for shooting arrows, typically made of a curved piece of wood joined at both ends by a taut string.
  2. 3. a supernatural creature of folk tales, typically represented as a small, delicate, elusive figure in human form with pointed ears, magical powers, and a capricious nature.
  3. 5. mythical animal typically represented as a horse with a single straight horn projecting from its forehead.