20q.net will blow your mind.

Okay, so yeah, I was thinking of tape, I don't know how they got it, but they did.

Q20. I am guessing that it is a roll of duct tape?
Right, Wrong, Close
19. Is it human powered? No.
18. Do most people use this daily? No.
17. Does it go inside other things? No.
Can it float? Unknown.
16. Can you hold it? Yes.
15. Does it fold up easily? No.
14. Does it contain a liquid? No.
13. Can you order it at a restaurant? No.
12. Do you carry it in your pocket? No.
Do you use it at night? Unknown.
11. Is it larger than a microwave oven (or bread box)? No.
10. Is it man made? Yes.
9. Is it hard? No.
8. Have you seen one in real life? Yes.
7. Does it get wet? Sometimes.
6. Can it be used to season foods? No.
5. Can you see through it? Sometimes.
Is it white? Unknown.
4. Would you give it as a gift? No.
3. Does it display information? No.
2. Would you find it in an office? Yes.
Is it larger than a pound of butter? Unknown.
1. It is classified as Other.

It starts at question 1, and asks you other questions. I did not think it was going to guess duct tape. Seriously, this computer must be smarter than most people, because I don't think anyone would have guessed tape.
try it out: http://www.20q.net/