Lyra's birthday crossword

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Across
  1. 5. People send these in the mail
  2. 6. Make the house look nice with these
  3. 7. Bake a special one for a birthday
  4. 9. Send these to invite people to your party
  5. 10. Wear a funny one on your head
  6. 11. The people who come to your party
  7. 12. Lyra's birthday flower
Down
  1. 1. Hang this from a tree and hit it with a stick
  2. 2. You have to blow this up
  3. 3. Everyone gives you these
  4. 4. What you get if you win a competition
  5. 7. Light me with a match
  6. 8. Activities at the party
  7. 9. Sweet topping on a cake