Pressure and Fluids
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Pocket Tornando
The Pocket Tornado:It's like holding the power of the weather in your hand!
$6.99
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UFO Solar Balloon
Sun powered fun! Fill the 10 foot long black plastic Solar Balloon with air, close up the end and take out into the sunlight.
$4.95
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Vortex Tube - a.k.a Tornado Tube
Create your own tornado in a bottle! Simply fill a 2 liter plastic soda bottle 2/3 full with water...
$1.19
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