EXP-64

Clickety-Clackety Coin

Learn how to make a coin move without touching it.

What you need

2-litre plastic soda bottle, A quarter glass of Water and a Coin.

What to do

1. Place the empty uncapped bottle in the freezer for 10 minutes.

2. Dip the coin in water.

3. Take out the bottle from the freezer and immediately place the wet coin on the top of the open bottle.

4. Wait and watch the coin move! As it moves, it will make a clickety-clackety noise.

What’s happening

When the bottle was taken out from the freezer, the cold air inside the bottle expanded and tried to rush out of the bottle. This air flow caused the coin to move!