My first crosswords

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Across
  1. 4. A vehicle that takes kids to and from school or school events
  2. 6. A big balloon filled with hot air that carries people in a basket through the sky
  3. 8. An underground train, usually electric
  4. 10. A flying vehicle that uses spinning blades (rotors) to stay in the air
Down
  1. 1. A boat powered by steam
  2. 2. A small two-wheeled cart pulled by a person, carrying one or two people, often with a cover
  3. 3. A military ship that goes underwater
  4. 5. A flat surface, like wood, used to float or move on water
  5. 7. A bike-like vehicle with one wheel in front and two in the back
  6. 9. A small flying device with a camera, controlled from a distance