A big coin such as a quarter or half dollar works best for this trick. Secretly place a small sewing pin, head down, in between your index finger and middle finger. Pinch the pin between your knuckles. Make sure this is not a very sharp pin. Balance the coin against the pin so that the pin is hidden from view. It will look as if the coin is levitating on your hand. Lightly release the grip on the pin and let the coin slowly fall backwards. It will appear as if you are slowly releasing the levitation balance with your mind. This trick should only be practiced by older grade school children.
Before performing this trick, place a quarter in a small inside cuff of your left pant leg. Don't move around a lot or you will lose the quarter too soon. Ask someone in the audience if you can borrow a quarter. Ask him to mark it with a permanent marker so he can examine it later to be sure he gets the same quarter back. Then place the quarter in your right pocket and say, "I am always losing quarters because I have a hole in my pocket, but the weird thing is, I constantly lose quarters that are in my right pocket but the hole is in my left pocket." Then shake the other quarter out of your cuff with your left leg. Immediately pick the quarter up and place it in your right pocket. Carefully take the other quarter out with your hand and say to the volunteer, "I'm sorry, was I supposed to give this back or was it a tip?" Give the coin back to the volunteer and he will see that it is the same marked quarter he gave you.
Take a quarter and stick it to your left palm using double-sided tape or magician's wax tape. Ask for a volunteer who has a quarter. Take the quarter in your right hand. Ask the volunteer to hold out her hand. Place your left hand on her hand, bridging your palm so that the quarter does not fall out too soon. Then place the quarter she gave you on top of your left hand. Tell her you are going to transfer the quarter from your hand to her hand. Slap your hand hard enough so that the quarter falls out of your palm.