Polar Bears & Pyjamas

123456789
Across
  1. 2. the best disguise
  2. 4. the skin used to make coats
  3. 6. a puzzle to solve
  4. 8. transport in the Arctic
  5. 9. the sun never sets
Down
  1. 1. I can walk on thin ice
  2. 3. a long, thin shard of ice
  3. 5. very cold environment
  4. 7. a house made of ice