Without giving away the secret, this effect is simply not very practical. There really is nothing
special about what comes with the trick, other than the specially made cards to look like postcards.
The props (postcards and box) are not even the same as in the demo video; they look much more basic
and not as glamorous. Honestly, I think I have almost everything to do this trick with except the
postcards already. It isn't worth the money. I will use this, but add my own handling.