As part of our Summer Fun Box, we had vinegar and baking soda science experiments. The balloons had baking soda inside. We filled our water bottles with vinegar, and put the mouth of the balloon over the top. At "go", everyone pulled their balloons up and emptied the contents into the bottles and watched the balloons fill with air. They thought this was pretty cool. We all were leery of the first one because we weren't sure if it would stop before it popped. Luckily, it did.
We repeated it several more times and they were mesmerized each time. We'll have to include this one again next year!
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