20Q

Q10. Can this thing that it's part of be found in a classroom?

No.

So, here is what I have so far:

1. Not a living thing
2. Not (usually) edible
3. Bigger than a laptop
4. Has 2 colors (usually)
5. Not striped
6. Not colored in a uniform pattern with 2 colors
7. Common household object
8. Not made of paper and/or plastic
9. Does not use electricity; part of something that uses electricity
10. Not found in a classroom

Q11. Can it be found in a household/work office?

Sometimes they can be found in a house.  They are not found in a work office (unless your job is making these ).

Q12. Is it used for entertainment?

No.

Q13. Is it used very often?

Yes.

Q14. Can it be found in a bathroom?

No.

Clarification on Q12: when I say entertainment, I mean sports, music, films, etc.

Is that what you mean?

Yes.  This has nothing to do with sports, music, films, or anything similar.

EDIT: Well actually, this is part of an object that is used in some sports.

Q15. Is it made of metal, and if it is, is it made completely of metal?

Yes, it has some metal in it.

So, here is what I have so far:

1. Not a living thing
2. Not (usually) edible
3. Bigger than a laptop
4. Has 2 colors (usually)
5. Not colored in a uniform pattern with 2 colors (i.e. striped)
6. Common household object
7. Not made of paper or plastic
8. Does not use electricity
9. Part of something that uses electricity
10. Not found in a classroom, work office, or bathroom
11. Sometimes found in a house office
12. Not used for entertainment
13. Used very often
14. Contains some metal

Uh, I need a hint...

Q16. Does it contain glass?

No.

Hint: It is round.

Umm...

No, it's not an "Umm...".  [sarcasm]Pretty close, though.[/sarcasm]