Adult Supervision Required...
Empty soda or water bottle (any size)
1. Tear the paper towel in half. Take one half and tear it in half again. You will use one of these smaller squares as your "wrapper".
2. Place about a tablespoon of baking soda on your wrapper. Fold it up and twist the ends closed so that the baking soda is neatly inside.
3. Pour about 1/4 cup of vinegar into your bottle, then add the wrapper of baking soda.
4. Quickly place the balloon securely over the top of the bottle and watch the balloon blow up all by itself!
You can swirl the liquid in the bottle to help the two chemicals react once the balloon is fastened to the top.