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Teal square with a music note in the center and six energy bolts surrounding the square - from Vi Hart
 

Chromatic Challenge - Treble Clef

Vi Hart
Sold Out
Teal square with a music note in the center and six energy bolts surrounding the square - from Vi Hart
 

Chromatic Challenge - Tenor Clef

Vi Hart
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Teal square with a music note in the center and six energy bolts surrounding the square - from Vi Hart
 

Chromatic Challenge - Guitar Tabs

Vi Hart
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Teal square with a music note in the center and six energy bolts surrounding the square - from Vi Hart
 

Chromatic Challenge - Bass Clef

Vi Hart
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Teal square with a music note in the center and six energy bolts surrounding the square - from Vi Hart
 

Chromatic Challenge - Alto Clef

Vi Hart
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Teal square with a music note in the center and six energy bolts surrounding the square on top of Pi Day 2022 sheet music - from Vi Hart
 

Piano Sheet Music Digital Download and MP3

Vi Hart
$4.00
Front and back of Pi Day 2022 bronze coin. Front: A cartoon drawing of a triangle. "In trigonometry we trust 3.14 dollars” is written around the triangle in handwritten font, surrounded by a circle of music notes and bars. Back: “Pi Day 2022 Chromatic Challenge Winner” is written in serif font on back in warped text surrounded by a circle of music notes and bars.
 

Pi Chromatic Challenge - Metal Coin and Digital Download

Vi Hart
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Blue pen with black grip with the lid off. The lid has a silver clip. On the lid, “My Other Pen is” is written in white Greek font. “Riptide” is in yellow Greek font. On the barrel of the pen, “The Newest Olympian” is in white sans serif font. Below, “With Mike Schubert” is in white sans serif font with a trident going through - from the Newest Olympian
 

"My Other Pen is Riptide" Pen

The Newest Olympian
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Blue base sticker, the right side is squared off, the left is bubbled around the text. “The Newest Olympian” is written in white sans serif font. “With Mike Schubert” is in white sans serif font below. A yellow trident is to the left of text - from The Newest Olympian
 

The Newest Olympian Logo Sticker

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A flashlight shines a yellow light on the words "Meddling Adults" with a tag that reads "Live From New York!". There is a silhouette of a man in pink.
 

Meddling Adults Live in NYC Replay

$10.00
Multi color poster map of quantum computing.
 

Map of Quantum Computing Poster

Domain of Science
$17.40
A blue circular pin with a black border. A white, gray, and tan cartoon drawn dog takes up the majority of the pin, parts of it breaking the boundary of the circle. “Run for Gus” is in red sans serif font at the bottom - from The Ginger Runner
 

Run For Gus Enamel Pin

Ginger Runner
$12.00
A white zine with line drawings of John Green, three viruses, a key, and a woman pouring milk are all surrounded by pink and blue lines. “The Anthropocene Reviewed Zine” is in black serif font at the bottom - from The Anthropocene Reviewed
 
An open book with a red page on the left. “Zines” is in red serif font surrounded by a white rectangle with a blue border. On the right is text of the zine - from the Anthropocene Reviewed

The Anthropocene Reviewed Zine

$13.80
A yellow sweatband with a smiling face that has a fireball on the side of each eye - by Brian David Gilbert
 

Brian David Gilbert Sweatband

$15.00
 

Three Black Halflings Tip Jar (Plus Outlaws & Obelisks EP Digital Download!)

From $1.00
A poster featuring a desert, a pyramid, and old standing buildings. On the poster are the words "Outlaws and Obelisks". From Three Black Halflings.
 

The Outlaws & Obelisks Poster

Three Black Halflings
$13.40
A black and yellow logo pin from Three Black Halflings. In the middle are black, block text "3BH".
 

Three Black Halflings Pin

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A sticker pack from Three Black Halfings. There are four stickers. One has two dice, each showing a 20 and the text "Roll for Melanin". One says "Poochieratbag". One has three pixelated figures and a talking bubble over one that says "Hullooo Halflings!". The last sticker is a warm color gradient with a fist in the middle of a pattern that encircles the fist.
 

Hullo Halflings Sticker Pack

Three Black Halflings
$10.00
A purple and blue horizontal poster covered in text and images of black holes - by Domain of Science
 

Map of Black Holes Poster

Domain of Science
$17.40
An orange square with four white hands coming in from each side. “Partners in Health” is to the right in orange sans serif font - from DFTBA
 

Donation to Partners In Health Sierra Leone

DFTBA Records
From $0.01
 

MinuteEarth Explains: How Did Whales Get So Big? And Other Curious Questions…

$18.95
A light-purple and blue poster covered in text and graphics - by Domain of Science
 

Map of Superconductivity Poster

Domain of Science
$17.40
Yellow cat pin with a thin black outline. Two small paws at the bottom with a tail coming out at the bottom right. Tongue is hanging out and eyes are white with two black X’s in its eyes - from Physics Girl
 

Dead Schrodinger's Cat Enamel Pin

Physics Girl
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Blue cartoon cat pin with black outline. Two small paws are at the bottom with a tail coming out of the bottom left. Two white eyes with black pupils looking off in opposite direction - from Physics Girl
 

Alive Schrodinger's Cat Enamel Pin

Physics Girl
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