Fun crossword, but the clues are riddles.

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Across
  1. 3. What has a bed, but never sleeps?
  2. 6. What is full of holes but still holds water?
  3. 7. What goes up but never comes down?
  4. 8. What is lost but not returned?
Down
  1. 1. I open and close but I’m not a book. What am I?
  2. 2. What can you break, even if you never pick it up or touch it?
  3. 4. I’m tall when I’m young, and I’m short when I’m old. What am I?
  4. 5. I have legs but cannot walk. what am I?