Using the standard method, you show two US Quarters and try to balance one on top of the other. By holding one coin between your thumb and fingers you can place the second coin on its edge, and it will stay there. If you want, you can even turn the coin once it is balanced. 

This is a quick stunt you can always carry with you and use. Ideally you remove a pocketful of change, pick up the two gimmicked quarters and proceed with the stunt. The coins are not examinable, but you can easily add them back to the pile of coins and put them back in your pocket. If necessary, you can remove two different ones at the end.

You get two gimmicked US Quarters (one female, one male) and access to Tangopedia where you will find the tutorial. A Tango Magic product.

NOTE: The trailer demonstrates the trick with Half Dollars. We only carry the Quarter version since it is more innocent and organic.