Science Projects And Inventions

YOU NEED:

• Two straws
• A glass of water

Slide one straw into the glass of water. Put another straw beside it but outside the glass. Challenge a friend to put the end of the two straws in his or her mouth and drink some water.

It just cannot be done! But you do it easily. The Secret : Just place your tongue over the end of the outside straw.

HOW  DOES  IT  WORK?

When the straw on the outside is sealed by your tongue, you draw liquid through the straw but should both the straws be open you will draw only air.