Snowball fight

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Across
  1. 3. Warm hand coverings essential for snow play
  2. 5. Playful combat with snowballs
  3. 7. Snow structure used as a base
  4. 8. Footprints left in the snow
  5. 10. To launch something through the air
  6. 13. A small vehicle for sliding on snow
  7. 14. To avoid being hit
  8. 15. A tightly packed sphere of snow
  9. 17. Coat or jacket to stay cozy
  10. 18. To lower your body quickly
  11. 20. Imaginary snowy playground
Down
  1. 1. Heavy snowstorm
  2. 2. Ice crystals forming on surfaces
  3. 4. Stack of snowballs ready to use
  4. 6. The aim of a snowball throw
  5. 7. Participants in the fun
  6. 9. A fun companion built from snow
  7. 11. Season of snow and cold
  8. 12. Sound often heard during a snowball fight
  9. 13. To lose footing on ice or snow
  10. 16. Hat worn to keep the head warm
  11. 19. Coldness in the air