The magician shows a glass, upside down, and a coin on a sheet of colored paper.
He puts a handkerchief over the glass and moves it over.
He pulls the handkerchief off and Abracadabra! the coin has disappeared.
A sheet of construction paper (1), a clear glass, a handkerchief and a coin.
Trace the glass onto the sheet of paper and cut the circle out. Then tape it to the glass so when you put it onto a piece of paper the same color it blends in.
When you do the above put the glass onto a piece of paper and just basically move the paper covered glass over the coin while the whole thing is under the handkerchief so the glass covers the coin. Pull off the handkerchief. The coin will have "disappeared.