We used a balloon, bottle, vinegar, measuring cup and a table spoon for this science experiment.
We used the funnel and added a tablespoon or two of baking soda into the balloon. Wipe any baking
soda from the funnel and place it into the bottle. Pour about a half a cup of vinegar into the bottle.
Fit the balloon over the opening of the bottle making sure no baking soda falls inside.
Now lift the balloon and let the baking soda fall and mix with the vinegar.
When vinegar and baking soda mix, an endothermic reaction occurs. This produces carbon
dioxide which inflates the balloon. The endothermic chemical reaction will also lower the
temperature in the area surrounding the vinegar and baking soda so significantly that you will
be able to easily notice the change in temperature.