We have made a VORTEX bottle! More commonly known as a tornado bottle. We filled one bottle about 2/3 full of red water. Using the connector, we connected the two bottles together. If you flip it over fast, nothing leaves the top bottle! We tried all different ways of getting the water from the top bottle to the bottom bottle. You can squeeze the top. You can squeeze the bottom. The most fun is if you give it a little twirl! 
You get a Vortex! Why? In order for the water to move from the top to the bottom, air needs to be able to "trade places" with the water. 
It was just so much fun to explore the bottle and figure out how it works!
Next we drew pictures of what we saw happening in the bottle! The kids had so much fun drawing and exploring! 
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