How to make it: Add the baking soda in a bottle. Add vinegar in the balloon. Place the balloon on the bottle and then lift up the balloon letting the powder reach the vinegar. You will see some bubbles forming and the release of dioxide carbon gas. More
Helium/CO2 using vinegar and baking powder. You will need 1 bottle and a funnel. Using the funnel insert the baking powder into the balloon. Put the balloon over over the bottle. CO2 will start coming as well as bubbles. you might want to do this outside.