The Travelling Coin
The magician places a coin in one matchbox – the audience know it’s there because they can hear it rattling inside. He shows a second matchbox empty. But with just a wave of his hand, and the magician tips the coin out of the second matchbox and shows the first matchbox empty. (And as they say in all the best magic trick advertisements, everything can be examined!)
You can also view this trick on YouTube at https://youtu.be/_Ewl12ofDRM
You can see all the previous magic lessons here.