Introduction of the Slinky 1945

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Across
  1. 6. - Its nature
  2. 8. - Its primary form
  3. 9. - Key to its movement
  4. 11. - What it does when dropped
  5. 14. - Key to its promotion
  6. 15. - Bendable quality
  7. 16. - Material used
Down
  1. 1. - Shape of a Slinky
  2. 2. - Plaything
  3. 3. - Its popularity
  4. 4. - What it appears to do
  5. 5. - Piqued interest
  6. 7. - Target audience
  7. 10. - Invention's origin
  8. 12. - What it does when compressed
  9. 13. - Material it's made from