- an empty soda bottle
- a small piece of paper
- a hairdryer
- Fold the paper as small as it will go and shove it just inside the neck of the soda bottle, while the bottle is resting on its side. Keep the paper wad in the neck of the bottle.
- Grab the hairdryer, turn it on and shoot air into the neck of the bottle. Watch what happens to the paper wad!
Where did the paper wad go to when you aimed the hairdryer at it?