• An old empty water bottle
• Balloon
• Baking soda
• Vinegar
• Paper towelling - Cut or ripped into squares

What to do:

• Place one Tablespoon of baking soda onto a small piece of paper towelling. Roll it up and twist the ends so the power is secure in the towel.
• Pour about 1/4 of a cup of vinegar into the empty bottle
• Drop the rolled up paper towel into the bottle and quickly put the balloon over the top
• Watch as the balloon blows it's self up. It's like magic. COOL!