Class Work Puzzle

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Across
  1. 4. Broken device David thought they could fix.
  2. 6. Powers the rocket ship.
  3. 7. Founder of the mushroom planet.
  4. 9. Where the wise men kept their ideas.
  5. 12. David's friend.
  6. 13. Mebe and Oru.
  7. 18. Contained the special add.
  8. 19. The mushroom planet.
  9. 20. The electrically powered filter part.
Down
  1. 1. Leader of Basidium.
  2. 2. Sold by Mr. Bass's family.
  3. 3. Items brought along on the trip.
  4. 5. The street where Mr. Bass lives.
  5. 8. Mrs. Pennyfeather's kind.
  6. 10. Special food for the mushroom people.
  7. 11. David and Chuck's transportation.
  8. 14. Solution for Basidium's problem.
  9. 15. Used to look at the stars.
  10. 16. Main protagonist.
  11. 17. Mrs. Pennyfeather.