Mrs. Prince and mrs smith were planning a party for their office to celebrate at the end of school. They bought a bunch of balloons and blew them up. What is inside a ballon?

The correct answer is gas such as helium, oxygen, hydrogen or air.

Step-by-step explanation:

Balloon are flexible bags that can be filled with air. Usually a balloon is made of latex or rubber or nylon and come in different colors and shapes. Sometimes balloons are even inflated with smoke or some liquids for other scientific uses.

Party balloons are balloons twisted in shapes and sizes and of different colors for entertainment purpose. Usually a party balloon is filled with air from the mouth or sometime with helium as it is lighter than air. Balloons filled with air stay for longer than balloons filled with helium.