.

Get Your Crowd Going Kids YELL & YELL

Open the doors of the frame to show that the frame is absolutely empty.

Close both the doors. Now he introduces a playing card pasted on a rigid board.

He opens the right door and places the card.

The door is closed. The frame is tilted to the left. 

Opens the right door and tells the audience that card has vanished.

The right door is closed and the frame is tilted to right and the left door is opened telling the audience that the card is also not in this side.

This is repeated  over and over again, the kids will constantly shout that the card is on the other side.

Finally both the doors are opened.

The card has vanished.