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These balls dance in changing patterns as they swing to their own rhythms.
See your friends go from tiny to towering in a few steps.
Use your voice to make visible patterns in sand.
What happens when you double the size of a chair?
Randomly toss some toothpicks, with pi as your reward.
by Pearl Tesler • June 28, 2017
Cardboard gets its Amazonian strength from simple geometry.
We use mathematics to make sense of the world—but how?
Use a slow-moving wheel to investigate position, speed, and acceleration.
What do plants know about numbers? Paul Dancstep investigates.
Pi Day isn't just a day—it's a way of life.
Explore graphing, angles, and storytelling by building a seesaw for your smartphone.
Turn your phone into a pocket science laboratory with tools to measure light, motion, sound, and more.
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