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Uranium Glass Ball
New
Out Stock

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. ...

$5.00
Shashibo Box
New
Out Stock

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...

$19.99
Tube of 20 Neodymium Magnets
New
Out Stock

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
Aerogel
New
22% Off
Out Stock

Aerogel is one of the most impressive materials humans have created...so far. This vial contains 25mL (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$12.50
Martian Regolith Simulants
New
Out Stock

Martian Regolith Simulant: This tube of reddish material is engineered regolith to be chemically and mechanically identical to that of planet Mars. Regolith is a mixture of dust, soil, broken rock and other organic materials. NASA uses this material to test...

$5.00
Lunar Dust Simulant
New
Out Stock

This vial contains simulated moon dust. It was engineered to be chemically and mechanically identical to the surface of ancient volcanic plains on the Moon, called maria. The particle size and composition was designed to match that of the samples returned...

$5.00
Skew Dice
New
Out Stock

These wacky-looking dice are actually just as fair as regular dice. Unlike other dice, Skew Dice aren't mirror symmetric. This means they come in two distinct forms that are mirror images of one another. Skew Dice are based on the trigonal trapezohedron....

$5.95
Water Beads
New
Out Stock

These tiny beads are made of a super absorbent polymer that can soak up a surprising amount of water. Plus, since they are almost entirely water when full absorbed, they have the same refraction index as water and become invisible...

$3.00
Storm Glass
New
26% Off
Out Stock

Originally made famous by Admiral FitzRoy, the captain of the HMS Beagle which Charles Darwin made his renown voyage upon, this sealed glass contains a solution that can form various crystalline structures, even filling the glass at times. This behavior...

$15.95$11.95
Rattleback
New
Out Stock

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
Tippe Top (Wood)
New
Out Stock

This spinning top has a surprising behavior. When spun, it will invert itself to spin upside down until it loses momentum. This interesting gyroscopic effect is generally credited to surface friction. This small friction causes a torque which gradually rotates the...

$2.00
Tungsten Black Hole Model
New
Out Stock

WE LAUNCHED THIS PRODUCT ON KICKSTARTER AND IT WAS FUNDED OVER 200% If you compress any amount of mass, it becomes denser. If you compress it enough, it will become so dense that light can no longer escape it—this size...

$40.00
Solids of Constant Width (Set of 3)
New
Out Stock

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
New
Out Stock

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
Silicon Wafer
New
Out Stock

Wafers are thin sliced semiconductors used to manufacture microelectronics and computer components. This sample is an 8" uncut silicon wafer with integrated circuits. Each wafer contains thousands of duplicate photo-lithographed circuits. Typically this wafer would have been cut up and the...

$19.95
Liquid-Filled Top
New
Out Stock

We don't usually carry religious paraphernalia, but we had to make an exception for these liquid-filled glass dreidels. When spun, the colored water in the internal cavity exhibits interesting physics to keep the top spinning. Includes stand.Dimensions: 3" tall x...

$12.00
Hot Surface Indicator
New
Out Stock

This 1.5" yellow label is a temperature-sensitive indicator that appears blank when cold, but reveals the word “Hot” and a warning graphic when the surface to which the label is adhered exceeds 50 °C (122 °F). The graphic contains a...

$2.50
Tippe Top (Aluminum)
New
Out Stock

This spinning top has a surprising behavior. When spun, it will introvert itself to spin upside down until it loses momentum. This interesting gyroscopic effect is generally credited to surface friction. This small friction causes a torque which gradually rotates the...

$11.00
Refractive Projection Lens
New
Out Stock

If you look closely, you can see the slight curves on the acrylic surface of this lens. They may not look like much, but they have been precisely arranged to bend the light passing through the lens to form the image projection....

$19.95
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