Science Projects And Inventions

YOU NEED:

• A match box
• A coin
• A pencil or a pen

Position an empty match box vertically and push in a coin between its cover and box which holds the match sticks as in the illustration. Catch the box in you left hand. With a pencil or the pen, hit lightly on the top end of the box. The pencil must simultaneously tap the two corners indicated by arrows. The coin will rise slowly through the box until emerges at the top of the box even as you continue hitting the box.