This is a great illusion and just a lot of fun. I showed this to my young daughter and it is by far
her favorite illusion. This illusion can also be used in conjunction with any number of routines
that require switching a bill. For example, you can switch a bill as part of a mentalism routine.
I use it along with the Horwitz add a number pad to convert participant random numbers, including a
switched bill into a meaningful number such as a telephone number.