Summer Fun: Science Experiment: Balloon Blower

Found this one on Pinterest ~ Fill a bottle 1/3 of the way with vinegar.  Using a funnel, fill a balloon with baking soda and carefully attach the balloon to the mouth of the bottle, being careful not to spill any baking soda into the bottle.  When ready, tip the balloon so that the baking soda spills into the bottle.  The kids loved this and were so suprised!