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Demonstrate the Amazing Power of Air!

This specialized bottle is fitted with a balloon and a stopper. With the stopper in place, the balloon can’t be inflated. But remove the stopper, inflate the balloon, then replace the stopper, and the balloon stays inflated! Next, fill the balloon with water and remove the stopper again. The spraying geyser that results will have you and your friends thinking about air pressure in a whole new way.