I've commented that PM should have a "tab" for "Under 10 buck tricks" because this one should be
near the top of the list.
Simply, this is a great, self working trick that plays superbly for a
paltry $4.50.
And, yes, affirming another review, a signed card will work and does make a great
souvenir.
So, the question is, how can you afford not to have one of these? You can't..."add to
cart".