There are so many ways to turn mixing vinegar and baking soda into a fun science experiment. In this video we combines three. First we just add baking soda to vinegar and see all the bubbles - adding soap will help to visualise carbon dioxide (CO2) produced during this chemical reaction. Then we used a balloon to help us mix ingredients and capture CO2 inside it. But did you know that CO2 is more dense than air? It means that it pushes air away and that is quite helpful if we want to, let's say,

Reaction of sodium bicarbonate and an acid