Repurposing old magazines and posters, kids at Queens Library at Sunnyside made their own pi charts for "Pi Day," celebrated every year on March 14 (3/14 or 3.14, like the first three digits in the number pi) all over the world. The symbol for pi is the Greek letter "Π." It is used in mathematics to represent a constant, the ratio of the circumference of a circle to its diameter: 3.14159 (and so forth, since pi is an irrational number and continues infinitely). There is no repetition or pattern to pi. It is unique and only a few digits are needed when calculating an equation. Trying to memorize the digits of pi are both challenging and fun. For this project we learned the first 10 digits of the number.

For more ways to celebrate the occasion, visit PiDay.org.