How To: Do balloon and bottle pressure experiments

Requirements: 2 soft drink bottles, 2 or 3 balloons , screwdriver.

First take the balloon and check the balloon.
Push a deflated balloon in to each of the bottles and stretch the open end over the bottle's mouth to seal the bottle.
And push the air into the mouth seal of the bottle.
The balloon does not expand.
Take another bottle, and make hole in any place of the bottle with screwdriver.
And push the air into the mouth seal of the bottle.

You can introduce this activity in front of a class and explaining how the expansion works. Blowing up a balloon is an example of air taking up space.
Tie if off and squeeze it to show that the balloon cannot be completely flattened without popping it.
Next method fill the air into the mouth seal of the bottle when figurine is placed on the hole of the bottle
And next, fill the water in the balloon with water pressure.
After few minutes you soak the bottle.