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In this activity, learners create a tornado in a bottle to observe a spiraling, funnel-shaped vortex. A simple connector device allows water to drain from a 2-liter bottle into a second bottle.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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A simple, yet fun activity that lets learners find the center of balance of a ruler (or any long thin object). Developed by the Exploratorium and no assembly needed.

1 cent - $1 per student Ages 4 - adult Under 5 minutes