Inflating a balloon with baking soda and vinegar is a classic kids’ science activity. Considering that it’s so simple and fun, I can’t believe it took us so long to do this activity!
To make some balloon magic, we gathered the following materials:
- Baking soda
- Empty water bottles
- Measuring spoon
Start by putting the funnel into the balloon. This will make it much easier to get the baking soda inside.
Add baking soda. We added about 4 teaspoons to each balloon. To get your balloons a bit bigger than ours, you could add 1 or 2 teaspoons more.
Next, use a funnel to pour some vinegar into your bottles. I didn’t measure the vinegar, but it was probably 1/3 cup or so, which ended up being much more than we needed.
Then, place the opening of the balloon around the opening of the bottle. Try not to let any baking soda into the bottle as you do this.
Finally, when you are ready for some magic, lift the balloon to allow the baking soda to fall into the bottle.
As soon as the baking soda hits the vinegar, a chemical reaction takes place that produces carbon dioxide. This gas is what inflates the balloon!
And after the oohs and aahs have died down, feel free to repeat the experiment!