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Do It
Results so far
What made your ball bounce highest?
Here's how kids have voted so far:
Pie chart representing percentages at right 28% drop it from higher up

39% swirl the water first

24% put more water in the cup


sneak peek
How's it work?
This Do It isn't well understand, but it seems that the ball bounces higher when it can receive more energy (kinetic energy) from the water. If the water is moving before you drop the cup, it has more kinetic energy to give to the ball, and the ball can bounce higher into the air. If the water is still when you drop the cup, it has less energy to give to the ball, and the ball does not bounce so high.

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