what have you learnt?

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Across
  1. 2. I can't see anything
  2. 4. this starts with Christmas
  3. 5. a loud noise
  4. 6. it's nice being lazy
  5. 8. I do this with books
  6. 9. the trees are budding
  7. 10. hit the shops
  8. 12. a holiday destination with lots of islands
  9. 13. ice crystals
  10. 15. let's go to the beach
  11. 16. like an ice cube
Down
  1. 1. water from the sky
  2. 3. pizza comes from here
  3. 5. they hosted the 2006 World Cup
  4. 7. the other half learn the language from here
  5. 11. forks of light
  6. 14. what season is it now?