Tricky Box: Alan Warner

The box is shown and it is shaken to revel something in it.  When opened a colored pencil is removed. A number of black cards are examined by the spectator and they along with the pencil, are placed in the box. When removed a special greeting (happy birthday, merry Christmas etc) is written on one of the cards apparently by a ghostly presence!  This can also be used as a utility device to force a card, prediction etc.

The box is 4 1/8 x 2 5/8 x 1 1/8 inches.