Balloon Baggies

Materials:  zip-lock bags                    baking soda                    vinegar                    tissues

Procedure:  1.  Tear a small square (approx. 3"by3")                           from the tissue.                     2.  Place one teaspoon of baking soda on                           the tissue square, and fold over the                                   edges.                     3.  Pour one-half cup of vinegar into the                          zip-lock bag.                     4.  Place the square of tissu?e paper into                          the zip-lock bag, and QUICKLY zip                          the bag shut.                      Now watch what happens!

Explanation:  The vinegar and baking soda combined in a chemical reaction to produce carbon dioxide. The carbon dioxide gas filled the bag, causing it to expand, much like a balloon.

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