A signed coin vanishes and appears in a Russian Doll.  Perhaps not an inspiring description but this is a great story routine by Craig Petty with a very strong vanish and reappearance of a coin selected by your volunteer.
The product was originally known as Where my Caravan has Nested and was put out by Taurus Magic. This current incarnation comes about with kind permission of Derek Lever.
Superbly made in wood with complete routine.

Curious Caravan