Money Making Matchbox

Effect: Two coins are placed in a matchbox and the box is closed. When the box is opened again the number of coins in it has increased to three.

Secret: Open the matchbox and hide a coin between the top of the drawer and the cover of the box as shown. Place two coins in the box and push the drawer shut. This forces the hidden coin to drop into the drawer. Make a few mystical passes over the box and then open it. Say: "That's the way a magician makes money!".