One balloon science fair idea that you can work with is to use balloons to test air currents. In this experiment you will float inflated balloons on air currents to determine their direction and strength. To turn this experiment into a science fair project you will need to come up with a hypothesis to test. One sample hypothesis that you can use is “hot air currents travel upward.”

Another balloon science fair idea that you can turn into several different physics science fair projects is to use balloons as a propulsions device. One of the most common balloon propulsion experiments is the pinwheel rocket. This experiment uses a straw with a flex joint, a pencil, a straight pin and a round balloon. To create a variation on this experiment you can change the shape of the balloon or the angle the straw is bent at.

Air pressure can also be experimented with when designing a balloon project. In this case you will use a balloon to demonstrate how air pressure is used to inflated or deflate a balloon. Your hypothesis can be something like, “increasing the air pressure inside of a balloon will cause it to inflate.” Obviously this hypothesis is true, however, you can use it to come up with more advanced projects that apply this principal to other situations.

If you are interested in the funniest science fair projects, then consider using a balloon to design a louder whoopie cushion. For this experiment you will need to first come up with a hypothesis to test. For example, the hypothesis can be that the shape of the whoopie cushion’s opening impacts the loudness of the sound produced. You will then need to experiment with the design of your whoopie cushion to see if this is true or false.

Now it is time for you to come up with your own balloon project ideas. Your first option is to expand on one of the above experiments. You can do this by changing one of the variables or conducting the experiment on a larger scale. Your second option is to conduct more background research on air pressure or propulsion. You can then use this information to come up with a new project idea.

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