Suesstastic puzzler

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Across
  1. 3. Dr. Seuss's real first name
  2. 4. the Oneseler's invention that everyone needs
  3. 5. the animal in the hat
  4. 6. protector of the forest
Down
  1. 1. The elephant who hears a who
  2. 2. the color of eggs and ham
  3. 3. The cat's special machine