Science experiment in grade 6

What happens when you put baking soda in vinegar?
We produce gas, a lot of gas! Enough to inflate a balloon without straining your lungs!
This gas is carbon dioxide (also called CO2) produced by the reaction between an acidic compound (vinegar) and a basic compound (bicarbonate).
A very telling example to show our “Year 7” students that, sometimes, a solid material can react with a liquid material to form a gaseous material.