The trick with a coin
Previously, the focus was shown with a metal (anniversary) ruble, now fit 5-ruble coin. Declare the present that can dissolve the coins in a glass of water. It is clear that the coin must be taken in any of the guests 
Then takes a simple faceted glass and a large handkerchief. Pour into a glass of ordinary water, cover it with a handkerchief, a handkerchief puts his hand with a coin, then ask someone with two fingers through a handkerchief to hold the coin over the edge of the glass. Sami is moving away from the table and saying a few magic phrases, agreeing to release a coin which falls with a crash into the glass. A couple of magical spells and you can remove the handkerchief, and to demonstrate that there is no coin in the glass. Mystery to a handkerchief, quietly, coin change on the glass circle of the same diameter, which is not visible in the water. A coin that moment migrates into your pocket.
Then takes a simple faceted glass and a large handkerchief. Pour into a glass of ordinary water, cover it with a handkerchief, a handkerchief puts his hand with a coin, then ask someone with two fingers through a handkerchief to hold the coin over the edge of the glass. Sami is moving away from the table and saying a few magic phrases, agreeing to release a coin which falls with a crash into the glass. A couple of magical spells and you can remove the handkerchief, and to demonstrate that there is no coin in the glass. Mystery to a handkerchief, quietly, coin change on the glass circle of the same diameter, which is not visible in the water. A coin that moment migrates into your pocket. 
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