Picture of Heres what you will need;
Balloon, backing soda, vinegar, and a bottle.

Step 1: First step.

Picture of First step.
Take the balloon and fill it up with baking soda fill about half the balloon.
flapper5012 years ago
Um..... Did you know you named the instructable, "Heres what you will need;" I think you would want that to be the page title, not the 'ible title. You should call the 'ible something like, "CO2 Project "