Halloween Balloon Blow-up

Happy almost Halloween Scientists! We have another “spooky” Halloween experiment for you today. Blow up balloons with fun Halloween drawings for a spooky good time.


3 Empty, Plastic Bottles (We used 16.9 oz Mountain Dew Bottles)

Baking Soda



2 Funnels (One for the vinegar, one for the baking soda)

1 tsp. Measuring Spoon

1/2 tsp. Measuring Spoon

Liquid Measuring Cup

Sharpie Marker (For Halloween Drawings on the balloons)

Safety Goggles


  1. Add any fun Halloween designs to your balloons. We used a green balloon for Frankenstein, an orange balloon for a jack-o-lantern, and a white balloon for a ghost.
  2. Set up the bottles so that you have a more baking soda bottle (add 1/2 cup of vinegar), a control bottle (add 1/2 cup vinegar), and a more vinegar bottle (add 1 cup of vinegar).
  3. Measure out and using a funnel place 1 tsp baking soda in the balloon for more baking soda. Carefully stretch the balloon end over the top of the correct bottle. Place 1/2 tsp of baking soda in the balloons for control and more vinegar and carefully attach the balloons to the correct bottles. One by one pour the contents of the balloon into the bottle and watch the reactions. Wait until the bubbling stops to determine the most effective mix.

Talking Points

In this investigation we experimented with vinegar and baking soda to fill up a balloon. Vinegar is an acid, it has a pH of less then 7. Baking soda is a base, it has a pH higher then 7. When you combined an acid and base together it causes a chemical reaction. In our investigation the chemical reaction was when the vinegar and baking soda started to bubble and fizz. The chemical reaction we created had carbon dioxide gas released and this is what blew up our balloon. Carbon Dioxide is a type of gas, we breathe in oxygen and breathe out carbon dioxide.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s