Completely show stainless steel cup in one hand.
Reach into the air with the other hand pluck a Half dollar out of thin air!
This Half dollar is dropped into the cup.
They SEE and HEAR the coin being dropped in the cup!!
Produce several more Coins from the air and drop them into the cup.
Each Coin makes a 'Ting' when falling in the cup.
Now asks someone to guess "How many coins are now in the cup?"
They guess six or seven. You state "No just one Big Half"
With an upward motion with the cup and a JUMBO HALF Dollar Coin jumps out of the cup!
Jumbo Coin included!