Keep Dry

paper towel
plastic cup
deep bowl
1) Crumple the paper towel. Stuff it into the bottom of the cup.
2) Fill the bowl to nearly full. The water must be deep enough that the glass can be completely submerged.
3) Turn the cup up-side down and shove it under water, making sure not to tilt it so that air escapes.
4) Pull the cup out of the water and show the girls that the paper towel is still dry. Explanation: The air inside the cup keeps the water from getting inside. When you place the glass under water up-side down, the air has no chance to escape. Because the air takes up all the space inside the cup, the water can not get inside the cup and wet the paper towel.