Display a small solid brass round box, asking to borrow a dime.
The box is opened by removing the lid with five small holes.
In slow motion put their borrowed dime inside the box, and put the lid back on.
You push five solid brass Spikes through the holes in the Lid and out the bottom of the box!
The dime inside the box was penetrated by all five solid Spikes!
Remove the Spikes – Open the box – Return the borrowed dime – Unharmed
Cloth Bag, Brass Box & Lid, Five Spikes.