Pi Day Collection

Celebrate the irrational, transcendent, and never-ending ratio with our Pi (π) Day collection of gifts! You’ll find pi-themed jewelry, baking accessories, apparel, and more.

Celebrate in-person: Join the 37th annual celebration of Pi Day on Thursday, March 14 with free pie, a Pi parade, live music, and more!

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Circular metal pendant with numbers circling the edge and a pi symbol charm attached to the front. The pendant and charm are attached to a circular keyring.
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Exploratorium Pi Keyring
$ 14.95
A gold enamel pin depicting a slice of pie with the symbol for "Pi" on the top. The filling is orange.
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Pi Pie Slice Pin
$ 12.99
Tin cookie cutter made out of the tin in the shape of the Pi symbol.
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Exploratorium Pi Cookie Cutter
$ 3.95
A clear cake dish with a Pi symbol brown sugar cake dusted with powdered sugar.
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Exploratorium Pi Cake Pan
$ 16.99
A cream-colored tote bag with 1,878 digits of Pi in gold, creating a circle printed on the front. In the middle is the Pi symbol in black. The strap is black.
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Exploratorium Pi Black & Gold Tote
$ 24.00
The Exploratorium Pi Shrine Moscow Mule Mug is a copper mug with a brass handle. The Exploratorium's own Pi Shrine is etched on the front. The digits of Pi moves in a circular design, gradually getting smaller trailing off to a Pi symbol in the middle.
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Exploratorium Pi Shrine Moscow Mule Mug
$ 21.00
A black silicone ice cube tray that freezes ice into the shape of the Pi symbol. There are three ice cubes in the form of Pi along a diagonal from upper left to bottom right.
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Exploratorium Pi Ice Cube Tray
$ 14.99
A large pint glass filled with beer. Math-themed etched shaker glass features the digits of Pi opposite Kochanski's construction of his approximation of Pi.
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Pi Theorem Pi-nt Glass
$ 20.00
The math-themed rocks glass is etched with digits of Pi for your detail-oriented side, and an approximation of Pi.
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Pi Theorem Rocks Glass
$ 18.00
A fine pewter pin in the shape of the Pi symbol on a white card with Exploratorium on the top in black.
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Exploratorium Pi Pin
$ 5.95
Golden Hexagon pendant with the numbers of pi in a spiral. The symbol for pi is engraved in the center, as well as the word "shrine."
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Exploratorium Pi Shrine Pendant
$ 22.00
Golden hexagon earrings with the numbers of pi in a spiral. The symbol for pi is engraved in the center, as well as the word "shrine."
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Exploratorium Pi Shrine Earrings
$ 14.00
A clear 18oz glass with different math equations in black ink all around the surface.
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Equations That Changed the World Drinking Glass
$ 20.00
A set of four white ceramic pudding bowls with the proofs of classic theorems of Euclid, Hippasus, Pythagoras, and Gauss. Each bowl is 8 oz., 4” diameter, 2” tall
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Proof is in the Pudding Bowls
$ 31.00
A 16oz pint glass with an image of Ada Lovelace with math symbols around the outside printed in black. A golden beer fills the clear glass to show contrast against the black printed sections.
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Ada Lovelace Pint Glass
$ 18.95
A navy blue sock with light blue on the cuff, heel, and toe; light blue Pi symbols are throughout the sock surface.
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Pi Symbol Socks
$ 13.95
Dark gray socks with Pi symbol and 85 digits of Pi in white and green.
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85 Digits of Pi Sock
$ 13.95
A black sock with white chalkboard style numbers and equations with red toes, tops, and heels.
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Math Socks
$ 12.00
A gentleman is standing while playing with a blue light-up Kendama. The Pi shirt is black with gold ink in 1,878 digits of Pi surrounding a blank Pi symbol.
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Exploratorium Pi Unisex T-Shirt
$ 34.00
A white paperback book with half of a pie with a slice taken out on the bottom on a red and white checkered tablecloth. "How To Bake π" is in red above.
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How to Bake Pi: An Edible Exploration of the Mathematics of Mathematics by Eugenia Cheng
$ 17.99
"The Master Theorem" puzzle book is an oversized paperback with a dark blue cover with different mathematical and mysterious symbols in white.
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The Master Theorem - A Book of Puzzles, Intrigue and Wit by M.
$ 29.99
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"The Magic of Math" is a paperback book with a purple cover with math equations in white in front there is a magicians hats and two white gloved hands under the books title.
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The Magic of Math: Solving for X and Figuring Out Why by Arthur Benjamin
$ 17.99
Sir Cumference Math Adventure Book Set by Cindy Neuschwander
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Sir Cumference Math Adventure Book Set by Cindy Neuschwander
$ 49.95
8" x 8" board book illustrated book cover of the ABCs of Mathematics. Three circles with Addition, Base, and Chord. Red spine with science tools in white .
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ABCs of Mathematics by Chris Ferrie
$ 9.99