I used to demo this everyday at the local Magic Shop. I performed this hundreds, maybe thousands of
times. It is a really excellent trick. It can be a very fun trick for beginners and if you use a
little imagination it can be a very useful item that not many will see for a professional routine.
That can be used to restore, change, vanish or exchange small flattish items. It is easy to do and
is surprisingly deceptive. I see Penguin is at the moment out of stock. If you have a local Magic
Shop go there and get it. It is inexpensive and you will like it.