Camping by the beach

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Across
  1. 3. Footwear that’s always full of sand
  2. 4. You forgot it and now you’re bright red
  3. 7. Shade-provider you carried from the car
  4. 10. Let’s have some wind-powered fun
  5. 11. Nature’s treasure hidden in the sand
  6. 14. Five-armed tide pool wonder
  7. 16. A badge of beach time (or burn!)
  8. 18. The ultimate seaside construction project
Down
  1. 1. Beach safety superhero
  2. 2. Used for underwater exploration
  3. 4. Let’s see what’s hiding under the waves
  4. 5. Bobbling swimmer you try to avoid
  5. 6. Dig holes for castles or crabs
  6. 8. Essential tool for collecting shells
  7. 9. Picnic-stealing bird
  8. 11. For catching big breaks
  9. 12. Tiny sideways walker at low tide
  10. 13. Cooler for keeping drinks and snacks cold
  11. 15. Must-have for drying off after a swim
  12. 17. Natural soundtrack of the coast