Things to Buy for the Love of Pi
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Too busy memorizing up to the 67,891st digit of our favorite mathematical constant (good luck, potential world-champ) to bake your own treat? Save and order one of Zingerman's delicious pies. Better yet, sample their three hard-hitters at once with the <a href="http://www.zingermans.com/Product.aspx?ProductID=G-3PI">Nosher Pie Party</a>, which includes pecan, chocolate chess, and cranberry walnut pies. ($50)

Slice of…

Too busy memorizing up to the 67,891st digit of our favorite mathematical constant (good luck, potential world-champ) to bake your own treat? Save and order one of Zingerman’s delicious pies. Better yet, sample their three hard-hitters at once with the Nosher Pie Party, which includes pecan, chocolate chess, and cranberry walnut pies. ($50)
Lady-geeks will be proud to tote all those books to class in <a href="http://www.etsy.com/view_listing.php?ref=sr_gallery_2&amp;listing_id=21205821&amp;ga_search_query=pi&amp;ga_search_type=tag_title&amp;ga_page=&amp;min=&amp;max=&amp;order=">this cute homage</a> to the only mathematical constant with a holiday. Forget mnemonics: machine-washable cotton makes this the easiest time you'll probably ever have with pi. ($25)

Shut Your Pi-Holder

Lady-geeks will be proud to tote all those books to class in this cute homage to the only mathematical constant with a holiday. Forget mnemonics: machine-washable cotton makes this the easiest time you’ll probably ever have with pi. ($25)
Who has time to tie laces when you've got circumferences on the brain? Slip into these <a href="http://www.zazzle.com/black_and_white_polka_dot_pi_slip_ons_shoes-167981443417932164">pi-bedecked Keds</a> and you'll be walking on cloud 3.14159... ($67.50)

Step in Pi

Who has time to tie laces when you’ve got circumferences on the brain? Slip into these pi-bedecked Keds and you’ll be walking on cloud 3.14159… ($67.50)
What better way to cap off Pi Day than with a <a href="http://www.zazzle.com/black_and_white_polka_dot_pi_slip_ons_shoes-167981443417932164">nightcap -- on the pi rocks</a>? Whip up one of ThinkGeek's delightfully nerdy Pi-tinis and don't forget the coup de grace of pi-shaped ice cubes. ($8.99)

The Big Chill

What better way to cap off Pi Day than with a nightcap — on the pi rocks? Whip up one of ThinkGeek’s delightfully nerdy Pi-tinis and don’t forget the coup de grace of pi-shaped ice cubes. ($8.99)
Slough away dirt and let your inner math dweeb shine through with these great <a href="http://www.etsy.com/view_listing.php?ref=sr_gallery_3&amp;listing_id=22179830&amp;ga_search_query=pi&amp;ga_search_type=tag_title&amp;ga_page=&amp;min=&amp;max=&amp;order=">glycerin soaps</a>. This sample pack of eight pi(e)-inspired fragrances -- including pumpkin, key lime, apple, and banana cream -- is sure to wet your whistle. ($8)

Clean as a Pi

Slough away dirt and let your inner math dweeb shine through with these great glycerin soaps. This sample pack of eight pi(e)-inspired fragrances — including pumpkin, key lime, apple, and banana cream — is sure to wet your whistle. ($8)
Got a little genius on the way? Set your baby on the track to geek-goddess status with this <a href="http://www.etsy.com/view_listing.php?ref=sr_gallery_1&amp;listing_id=17647188&amp;ga_search_query=pi&amp;ga_search_type=tag_title&amp;ga_page=3&amp;min=&amp;max=&amp;order=">adorable embroidered bib</a>. ($10)

Pi Kids

Got a little genius on the way? Set your baby on the track to geek-goddess status with this adorable embroidered bib. ($10)
Who knew pi could be so snazzy? Impress the geek-chic ladies with this <a href="http://www.amazon.com/50th-Decimal-Tie-Wild-Ties/dp/B000LK5B0S/ref=sr_1_4?ie=UTF8&amp%3Bs=apparel&amp%3Bqid=1236872731&amp%3Bsr=8-4&tag=camdenxpsc-20&asc_source=browser&asc_refurl=https%3A%2F%2Fwww.popsci.com%2Fgear%2Fthings-buy-love-pi&ascsubtag=0000PS0000043641O0000000020230605100000%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20">pi tie.</a> Really impress them if you can recite pi to the 50th decimal without peeking at the tie for help. ($24.95)

Pi One On

Who knew pi could be so snazzy? Impress the geek-chic ladies with this pi tie. Really impress them if you can recite pi to the 50th decimal without peeking at the tie for help. ($24.95)
It's not just Pi Day, it's also the day the world welcomed one of its most esteemed scientists. Wish Einstein a happy birthday by writing your research findings in <a href="http://www.etsy.com/view_listing.php?ref=sr_gallery_12&amp;listing_id=20790014&amp;ga_search_query=einstein&amp;ga_search_type=tag_title&amp;ga_page=4&amp;min=&amp;max=&amp;order=">this recycled-book journal.</a> ($6.50) Not enough celebration for you? Check out <a href="http://www.etsy.com/view_listing.php?ref=sr_gallery_21&amp;listing_id=21905486&amp;ga_search_query=einstein&amp;ga_search_type=tag_title&amp;ga_page=&amp;min=&amp;max=&amp;order=">this hat and scarf</a> set that turns the wearer into the physicist's doppelganger. ($40.00)

E = Albert Einstein’s Birthday

It’s not just Pi Day, it’s also the day the world welcomed one of its most esteemed scientists. Wish Einstein a happy birthday by writing your research findings in this recycled-book journal. ($6.50) Not enough celebration for you? Check out this hat and scarf set that turns the wearer into the physicist’s doppelganger. ($40.00)