Opa's birthday

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Across
  1. 3. make very happy
  2. 6. fun and _____
  3. 7. goes on a treat
  4. 9. change one letter of the birthday boy
  5. 10. you write these
  6. 11. put this around a gift
  7. 12. closely related people
  8. 14. when you are born
  9. 16. a particular birthday boy
  10. 17. hang these
Down
  1. 1. a birthday treat
  2. 2. you have one
  3. 4. a treat
  4. 5. a gift
  5. 6. a european language
  6. 8. an emotion
  7. 10. _______ time, come on!
  8. 13. helium
  9. 15. put this on a gift