Balloon Sandbag
Fri, May 10, 2013
Materials: Balloon, sand, water
Activity: Use a funnel to fill an un-inflated balloon with sand. Add water to the balloon. Tie the balloon. Squeeze it and watch it hold it's shape!
Research Questions: How does the addition of water to sand affect how the balloon sandbag holds it's shape? Adding a more or less dense liquid like syrup or oil? Starting with larger or smaller granules like popcorn or powdered sugar?
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