# Coin through an impossible hole – Experiment

What’s the effect?

A 2 pence coin is pushed through the hole made by a 1 pence coin.

You will need:

• A piece of paper
• 1x 2p coin and 1x 1p coin
• Scissors
• Paper/pen

What’s the method?

The series of photos above outlines how to do this. Start by drawing around the 1p coin with the pen or pencil. Then carefully cut out the hole with the scissors (see photo 2).

The challenge is then to push the 2p coin through the 1p coin’s hole. Which would seem impossible as the hole is clearly too small (as can be seen in photo 3).

To achieve the impossible… fold the paper in half, with the fold going directly across the hole’s diameter. Then insert the 2p coin into the paper (see photo 4).

The hole still seems to small but if you pinch the paper and fold the paper in such a way so that the curved hole begins to get straightened out (see photo 5) eventually you’ll reach a point where the 2p drops through the hole.

This is a good way of introducing the idea of circumference and diameter.