What is this project about?

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Across
  1. 3. stay in bed in the morning
  2. 4. meet
  3. 5. a sport in which a person jumps from an aircraft and falls for as long as possible before opening a parachuting
  4. 10. The sport or activity of using boats with sails
  5. 11. the sport of climbing on rocks or in mountains, or specially designed walls inside or outdoors.
  6. 12. leave home to meet friends, etc.
  7. 14. not go to bed
  8. 15. the sport or activity of moving across ice using skates.
Down
  1. 1. eat in a restaurant
  2. 2. the sport or activity of riding a horse.
  3. 6. The activity or sport of moving over snow using a snowboard.
  4. 7. exercise
  5. 8. the activity of going for long walks in the countryside.
  6. 9. cancel
  7. 10. The sport of moving on skis
  8. 13. start doing something new regularly