In the Invisible Touch magic trick, the magician asks a volunteer to hold out their hand palm up. The magician then takes a small metal object and lightly taps it on the volunteer's open palm. The volunteer feels a slight tingling sensation in their hand as the object is tapped. The magician then quickly moves the object away and asks the volunteer to close their fist. When they open their fist again, they find that the object has disappeared!
The secret to this trick is in how you tap the metal object on the volunteer's palm. You need to do it in a way that creates vibration without actually touching the skin. This can be done by holding the metal object loosely between your thumb and first two fingers. As you tap it against the palm, let your fingers bounce slightly off of each other so that there is no direct contact between them and the metal object. This will create vibrations that will be transferred to the volunteer's hand, making it feel like they are being touched even though they're not!