Balloon Magic

Inspired by our success creating balloon rockets back in April, I decided to look for some more simple experiments the Jelly Babies could do using balloons.

Launching a balloon rocket

The following two experiments are easy peasy lemon squeezy and require no fancy materials, just a few bits and pieces that almost everyone has kicking around the house.

Both involve magically inflating balloons without blowing into them.

Experiment One

Materials needed to inflate a ballon with lemon and bicarbonate of soda



2 Teaspoons of Bicarbonate of Soda

A Plastic Drinking Straw

An Empty Plastic Drinks Bottle – washed out and dried

50ml of Water

A Lemon


Squeeze the juice from the lemon.


Stretch the balloon by blowing it up and then letting it deflate.


Stir the bicarbonate of soda into the water using the straw and pour into the bottle.

Add the lemon juice to the bottle.

As quickly as you can, attach the balloon securely over the top of the bottle.

Science experiment with balloon

The lemon juice should react with the bicarbonate of soda to create carbon dioxide. As the carbon dioxide tries to escape from the bottle, it inflates the balloon.

Kitchen table science - inflating balloon experiment

Our balloon may not have inflated enormously but the littlest Jelly Baby was thrilled with the result of our experiment.

If you do not have a lemon to hand, this experiment works equally well with vinegar.

Experiment Two

This experiment simply requires an empty plastic pop bottle, a balloon, a freezer and a large bowl of hot water.

Freezer, balloon experiment

Stretch the balloon by inflating and deflating before attaching over the mouth of the empty bottle.


Pop the bottle with the balloon attached into the freezer for 30 minutes or more.


The cold temperature should cause the bottle to shrink the balloon.


Before taking the bottle out the freezer, fill the bowl with enough water to cover approximately 3/4 of the bottle.


Place the ice cold bottle into the water so it is standing up vertically and watch as the warm air magically causes the balloon to inflate.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your 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