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Comet Churyumov–Gerasimenko 3D Model
New
Out Stock

This 1:100,000 scale replica of comet P67, or Churyumov–Gerasimenko, was professionally printed in high resolution using data collected during the ESA Rosetta Mission. Size: 41mm x 35mm x 38mm (1.6 x 1.4 x 1.45")Material: Prototyping PLAColor: GreyMore info

$7.00
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. This is not a hologram, but a form of projection that uses the physics of how light behaves when passing... More info

$19.95
Mini Magnetic Compass
New
Out Stock
Invisible Blue UV Pen
New
Out Stock

Glows under UV lightMore info

$2.00
1:12 Scale Cinder Block Pallet
New
Out Stock

24 miniature concrete cinder blocks arranged on a miniature wooden pallet. Perfect for your desk.More info

$20.00
120-Sided Die
New
Out Stock

The d120 is the ultimate fair die allowed by mathematics and this is the world's first injection-molded d120. It is based on a polyhedron known as the disdyakis triacontahedron. Each face is an elongated triangle. These dice are perfectly numerically balanced, with the same sums for numbers around vertices of the same type. It can also be used as a dn, where... More info

$13.95
Glux Magnetic Putty
New
Out Stock

New magnetic GLUX putty with attractive properties! It’s infused with millions of magnetic particles. Includes a very powerful magnet to charge and demonstrate this putty’s unique powers. Recommended for Ages 14+Made in USAMore info

$12.00
Multi-Tool
New
Out Stock

This tool, the size of a credit card has many uses. Perfect for for your everyday carry. Keep one in your purse, wallet, and/or car.  Functions include: small flathead screwdriver (perfect for eyeglasses) nail/staple puller wire cutter small ruler (inches & cm) box opener letter opener bottle opener cutter (perfect for clothing hangtags) cable bender (for small wiring jobs) hex wrenches... More info

$9.50
Tungsten Black Hole Model
New
Out Stock

Over 200% funded on Kickstarter! 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 is the object’s Schwarzschild radius. An object that is compressed smaller than this radius is a black hole. This tungsten sphere has been engineered to have exactly the... More info

$40.00
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 is caused by an asymmetrical mass distribution and the instability between the rotational axes. As the mass shifts, the rolling... More info

$2.50
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 1 ½" diameterMore info

$12.00
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 roll as smoothly as if the object were on spheres. Additionally, these wonky shapes won't roll away. The precise shape is an orbiform... More info

$9.95
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 sphere on a second axis and forces it up onto the stem. Note the direction of rotation before and after... More info

$2.00
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 the shape shifting box? Collect & combine them all! Magnetic puzzle cube Transforms into over 70 geometric shapes Each Shashibo... More info

$19.99
Ferrofluid Display
New
-8%
Out Stock

Ferrofluid is an iron-based liquid that reacts in the presence of a magnetic field. Comprised of nano-scale magnetic particles suspended in a transparent liquid, ferrofluid aligns itself to a magnetic field, making it easy to visualize the field. With this amazing magnetic fluid, you can safely and easily play with it using the two included neodymium magnets. You can spike, toss, drop,... More info

$18.00$16.66
Gallium
New
Out Stock

Gallium is a metal with a very low melting point. In fact it will melt in your hand after a few minutes. Once it is liquified, it is an interestingly dense liquid, similar to mercury (except gallium is non-toxic!) This vial contains 15g of this interesting element. Non-toxic, but we wouldn't eat it. Like water, gallium expands when frozen, so... More info

$12.50
LED Ultraviolet Flashlight
New
Out Stock

These small ultraviolet flashlights are very convenient for identifying rocks, hunting for scorpions, or just trying to find where your dog or cat peed in the house. Longwave UV (UVA)Wavelength: 315–400nmPhoton energy: 3.1–3.94 eV Runs on 3 AAA batteries (not included).   More Info: Ultraviolet (UV) designates a band of the electromagnetic spectrum with wavelength from 10 nm to 400 nm, shorter... More info

$7.00
Battery Tester
New
Out Stock

Use this battery tester to confirm the charge left in your batteries.  Good for all common household batteries, including cylindrical, 9-volt, and button-style batteries.More info

$6.95
Storm Glass
New
-26%
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 was long thought to be indicative of the current weather conditions; however, these devices are now known to have little... More info

$15.95$11.95
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 the small space.  Made from a neodymium (Nd) alloy, these magnets each have about a 4lb pull (direct metal-to-metal contact).... More info

$5.00
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