This cool new Pi t-shirt features math constant Pi to 100 places and its definition of circumference divided by diameter of the circle.
You will be super-cool when you wear this shirt on March 14th, the Pi day!
On March 14th, people all over the United States participate in National Pi Day, which celebrates the irrational number Pi and encourages funding for math and science programs in schools.
Every kid needs one of these spheres!
Working model representing the sun, earth, and moon and their relationships.
The Star-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, writers, students, and you!
The Wimshurst Machine is a high quality static machine for student labs.
This SUPER Erector Construction set is one of the best you'll find anywhere!
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
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