Materials Required:
l Thin cellophane
l Scissors
Procedure:
- Cut a fish shape ¾ inch wide and 2 inches long from a piece of thin cellophane. (Make sure that you use cellophane and not clear plastic. You can tell the difference by the crackling noise cellophane makes when it is crumpled.)
- Hold the cellophane in the palm of your hand for a couple minutes. Suddenly you will see the fish wriggle up!
This Is What Happens:
Of course you know that the shape cannot actually come to life. The palm of your hand gives off perspiration, and this moisture is absorbed by the cellophane, causing it to swell. The side touching your skin absorbs more moisture than the dry side (the upper side), and this difference causes the curling action.
