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Shashibo Box
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Can you create more than 70 shapes?  Unlock the mystery of Shashibo! Each Shashibo is powered by 36 rare earth magnets. 1 cube transforms into over 70 shapes. Combine 2 or more Shashibos to build larger shapes and create more possibilities. Can you master...

$21.99
Aerogel
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Aerogel is one of the most impressive materials humans have created...so far.   Comes in a 1oz vial (approximately 1 heaping handful) of silica aerogel particles—the world's lightest known solid material. Commonly called "frozen smoke", it is safe to touch, hydrophobic (repels...

$16.00
Tube of 20 Neodymium Magnets
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Our mighty 4mm cubic rare earth magnets are incredibly useful, mesmerizing to fiddle with, and a steal for only 5 bucks for a tube of 20. We had these custom manufactured to the highest magnetization the factory could concentrate into...

$5.00
Yellow Uranium Glass Ball
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In the past, glass manufacturers added uranium to glass for color. Uranium has since become more strictly regulated, but the old uranium glass objects are still floating around. Because of the uranium content, these marbles glow bright green under ultraviolet light. ...

$9.00
Rattleback
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A rattleback is a type of spinning top that prefers to spin in one direction due to its unique semi-ellipsoidal shape. When spun in the wrong direction, it will automatically shift the momentum until it spins the opposite direction. This...

$2.50
Solids of Constant Width (Set of 3)
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These solids of constant width behave like spheres. This is because, regardless of the peculiar shape, the diameter is still equal at every point. You can demonstrate this property by setting a flat object, like a book, on them and it will...

$9.95
Retroreflective Glass Beads
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These microbeads are retroreflective beads—tiny glass spheres designed to effectively reflect light back to the light source. They are commonly applied to wet paint to create reflective surfaces and markings. They work by allowing light to pass into one side of the...

$5.95
Small Magnetic Field Demonstrator
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This is a quick and clean way to visualize magnetic fields. The demonstrator is a transparent acrylic case that holds iron filings. When it is placed over a magnet, the field pattern can be viewed directly, or it can be...

$5.00
Large Magnetic Field Demonstrator
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This is a quick and clean way to visualize magnetic fields. The demonstrator is a transparent acrylic case that holds iron filings suspended in a fluid of mineral oil. When it is placed over a magnet, the field pattern can...

$29.95
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