Start by gathering an empty water bottle, balloon, and a pushpin or scisors for later. To make sure that there is nothing wrong with the balloon, give it a test blow. Then, take the deflated balloon ...
Attach the balloon to the top of the pop bottle. The balloon will be deflated. Turn on your sink and make the water as hot as it will go (WORK WITH A PARENT) Place the bottle under the water and watch ...
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