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String and scissors are all you need to find pi all around you.
Viscous liquids create a mesmerizing light display.
Make dendritic diversions and bodacious branches.
Test how well your brain can see patterns.
Imperfect alignment can lead to interesting patterns.
Surprisingly, a flat panel rolls smoothly on non-circular rollers.
Use straight lines to learn about circles.
Randomly toss some toothpicks, with pi as your reward.
Substitute coins for radiation.
Create graceful loops and spirals by drawing on a spinning disk.
Square wheels roll smoothly on a round road.
How does this stack up?
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Attribution: Exploratorium Teacher Institute
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