Place an ordinary playing card in the frame. The card is covered by a clear plastic plate. Push a pencil through the middle of the frame- through the solid plate and through the card. There is a hole in the card- but the plate is still solid! How can you push a pencil through a solid plastic plate?? Baffling- and really easy to do!
The frame is made of plastic, and is approximately 5" x 7". The color of your frame may vary from the photo, but it is the same trick.