Magic Trick Effect : You throw a magic nickel into yourhand a couple of times and then close yourhand around it. When you open yourhand, it has turned into a quarter!
Magic Trick Method :

Magical Coin held in finger palm position.
Throw the magic nickel into your leftpalm a couple of times and pick it back up again.
This time, pretend to throw it again, but instead retain it and drop the quarter into your leftpalm instead. Immediately close your lefthand around the quarter.
Conceal the magic nickel in your righthand and as you slowly open your lefthand, ditch the magic nickel into one of your pockets. The spectator will see that the magical coin in your lefthand has turned into a quarter!
All at the Magic Help Desk Center