Summer crossword puzzle

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Across
  1. 2. surfers love them
  2. 4. perfect to get in the shade
  3. 7. we dive and swim in it
  4. 11. piece of clothing we wear at the beach
  5. 12. perfect to relax
  6. 13. we build castle with it
Down
  1. 1. refreshing snack
  2. 3. we love collecting them
  3. 5. sandy or pebbly shore by the sea
  4. 6. guide ships at sea
  5. 7. luggage for holidays
  6. 8. Meal taken outdoors
  7. 9. flying toy
  8. 10. a sphere to play with
  9. 11. brings light and heat
  10. 12. like a dolphin