The fun they had.

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Across
  1. 2. Feeling or appearing casually
  2. 4. The branch of mathematics dealing with manipulations of numbers
  3. 5. To exaggerate someone's wealth or importance
  4. 6. Done with full awareness
  5. 8. Fulfilling expectations or needs
  6. 9. In a Sad Way
  7. 10. A period of 100 years
Down
  1. 1. Working or produced by machines
  2. 3. Nearly, Almost
  3. 7. A disagreement