We're having fun at the beach!

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Across
  1. 4. pulled by a boat while standing on skis
  2. 5. swim with a tube to breath
  3. 7. stand on a board with a sail
  4. 8. land covered with sand near water
  5. 9. travel in a boat with sails
  6. 10. used to separate land
  7. 12. a great height
Down
  1. 1. a very larger body of water
  2. 2. use arms and legs to move in water
  3. 3. swim underwater with a tank of air
  4. 5. stand on a board on water
  5. 6. travel in a small boat with a paddle
  6. 8. a sphere that is kicked, thrown or hit
  7. 9. little size
  8. 11. a building with many stores in it