The first engine

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Across
  1. 2. to move or to make painting
  2. 4. powerful
  3. 6. old trains used to run with this
  4. 9. Trains runs on it
  5. 10. factories
  6. 11. something which has always some benefit
  7. 13. worked hard
Down
  1. 1. baby grew into adult
  2. 3. amazing
  3. 4. we should follow these three colours on traffic while driving the car
  4. 5. natural resources for minerals
  5. 7. cars and trains run due to it
  6. 8. trains are also called this
  7. 12. we should do it with interest