Blowing up a balloon

Science Experiment 

The children in Ruma Piwakawaka were asked the question "Can we blow up a balloon without blowing air into it?

About half of the children said "Yes" and the other half said "No"... 

How could we do it?

First, we looked at some ingredients we would need for our experiment.

We had a balloon, an empty bottle, vinegar and baking soda.

Next, we made a funnel out of paper so that we could put some 

baking soda inside the balloon.

Then we poured some vinegar into the bottle.

After that we carefully put the balloon onto the neck of the bottle.

We knew that the baking soda would fall down into the vinegar.

What do you think happened next?

The vinegar and baking soda mixed with each other and start to fizz and foam.

There was a gas that was made from the chemical reaction, called carbon dioxide.

The carbon dioxide had nowhere else to go except into the balloon.

And that is how our balloon inflated.

Afterwards, we wondered - why did the balloon stop blowing up?

Also, we answered our original question 

- Yes we can blow a balloon up without blowing into it!