Why a duck (6)?

You can play Twenty Questions here. I tried 'cricket bat' and the program came up with the answer after 19 questions - thus (from the bottom up):

19. Can you play games with it? Yes.
18. Was it used over 100 years ago? Yes.
17. Is it flat? Yes.
16. Is it human powered? Sometimes.
15. Is it hard? Yes.
14. Is it bigger than sofa? No.
13. Would you find it on a farm? Maybe.
12. Is it something you can purchase? Yes.
11. Does it bring joy to people? Yes.
10. Is it made of metal? No.
9. Is it a wild animal? No.
8. Is it small? Depends.
7. Is it tall? No.
6. Does it weigh more than a duck? Yes.
5. Do you use it in your home? No.
4. Does it go in your mouth? No.
3. Is it round? No.
2. Does it taste good with butter? No.
1. It is classified as Vegetable.

(Thanks: Abby.)