"The Adventures of the Curious Cloud: A Journey through the Sky":

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Across
  1. 2. the beautiful seven colorful friends
  2. 3. we do this with music
  3. 5. it appears in night
  4. 7. I play with them
  5. 8. it flies high
Down
  1. 1. we live in it
  2. 4. its in the sky
  3. 6. moves around