Here is Korea, the washing machines kind of suck, they take forever and they seem to cause a lot of damage to clothing, and the dryer is even worse (I usually hang my clothes outside to dry though). One thing that the washer constantly does is rip buttons off my cloths, not sure why it happens, but it does. Its no big deal though, because I found a great way to replace missing buttons without even having to go to the store.
Step 1: Ingredients
10won (or 1 cent)
Some string (I used some that I found lying around, can't figure out where it came from)
A sewing needle
White vinegar (optional)
Don't worry, I know that hammers and nails cost more then the budget for this project, but you will be able to return everything to where you found it at the end, only the money and string will be used, the scrap wood may be slightly damaged, but not very much. The vinegar (if you use it) will be dirty, and therefore shouldn't be used for cooking afterwards, but can still be used for cleaning.
Step 2: Clean Your Money (optional)
All done, time for the next step.
Step 3: Making the Button
Now you must repeat this step at least once more, but I suggest you make at least 4 holes total, forming a square around the center of the coin. You should make all your holes are facing the same direction, otherwise you might have sharp edges facing outwards (this might be desirable to you, I don't know).
Anyways, on to the next step.
Step 4: Sew It On
I used some string that I found lying around in my room, its slightly shiny and gold colored, its also a bit thicker than normal thread, which I figured was a plus (proactive defense against the washer). I really can't figure out where it came from, since I only own purple thread, and I have no fabric that is that color, its quite puzzling. Once again, I recommend using the side without sharp edges as the outside.
If you aren't sure how to thread a needle (its not hard), sew, tie knots, or sew buttons on, then there are plenty of other instructables dedicated to those subjects. To be honest, I really don't know that kind of thing either, everything I know about sewing came from an instructable.
Step 5: Put Your Clothes Back On
Also, be sure to return your tools to their original location.
That's it, you are finished. Hopefully you enjoyed defacing currency and making yourself a shiny new button for your clothes.