Have you ever tried the baking soda and vinegar balloon experiment? This classic self-inflating balloon science experiment is really among my favorites. It is so straightforward to do and also it yes, really is amazing to watch.

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The reaction between the baking soda and vinegar reason the balloon come inflate all on its own! It is a show-stopper experiment because that kids.

(See much more of my STEM projects for kids.)


How to do the Baking Soda and also Vinegar Balloon Experiment:

Supplies friend Will require for the Experiment:


Plastic water bottle, emptied

1 Large Balloon

White Vinegar

Baking Soda 

Small Funnel


TIP: Before starting the experiment, friend will desire to stretch out the balloon to do it more loosened and simpler to inflate.

Step 1- to water 1-2 spoonfuls of baking soda into the opening of the balloon, utilizing a funnel. You’ll must shake that a little bit to gain it down right into the basic of the balloon.

Step 2- usage the funnel again and also pour part vinegar into the plastic bottle until it is around an inch or two deep. Exact quantities do not matter.


Step 3- closely stretch the opening of the balloon around the mouth of the bottle leaving it hanging down till you are prepared for the reaction.

TIP: Don’t let any kind of of the soda dump right into the party while it is registered it.

Step 4- when you are ready to check out the chemical reaction happen, lift up the balloon allowing the baking soda to loss down into the bottle.


This is once the fun starts! Baking soda and also vinegar produce an awesome chemical reaction. The gas from combine the two will cause the balloon come inflate. It’s impressive. The more gas there is created, the bigger the balloon will certainly get.

Your kids, if they room anything favor mine, will beg to carry out it again, climate 10 much more times! This is yes, really a perfect science project for kids to try on their own.


If you execute repeat it, friend will need fresh vinegar in the bottle. As soon as a reaction happens, the is not quite so solid the second time through. The balloon go not generally inflate again unless the vinegar is fresh.My kids were amazed and wanted to do it again and also again and also again. Share up ~ above baking soda and also vinegar if you room planning this one! Luckily they are both rather inexpensive.

(It’s a good thing they room both so cheap!)

The science Behind It: Why go Baking Soda React v Vinegar?

When the vinegar and also baking soda integrate there is a reaction between an acid and a base. Vinegar is the acid and baking soda is the base. This reaction in between the two reasons a gas referred to as carbon dioxide to bubble and foam. This gas having actually nowhere else to go, increases the balloon making the self-inflating balloon happen.

See more: Sin(-Pi/4) - Find The Exact Value Sin(Pi/4)

Want more Baking Soda and also Vinegar Experiments?

We love the carbon dioxide reactions the these two substances create.