Best Sellers

Stirling Engine

Get this beautiful little engine here:

From EngineDIY: BUY NOW: Stirling Engine

Note: this site contains affiliate links for which I may be compensated

Stirling Engine: a very pretty and fully functional model of the famous external combustion heat engine, powered here by a tiny alcohol lamp (with an almost invisible flame). Heat engines produce mechanical motion from a difference in temperature- here the glass cylinder and piston side is kept at high temperature via the flame (to expand the gas within), and the cool side is the metal cylinder and displacer piston which acts as a heat sink to re-cool (and contract) the gas and then send it back to be heated again each cycle. This module also includes a tiny generator and LED circuit. Swipe to see more detail and watch the engine power up. This closed-cycle regenerative heat engine design is attributed to Scottish engineer Robert Stirling back in 1816.

Simple Stirling Engine

Get this amazing model engine here:

From EngineDIY: BUY NOW: Simple Stilring Engine

See other featured DYI devices here: EngineDIY Models

Note: this site contains affiliate links for which I may be compensated

Simple Stirling Engine: Perhaps the simplest piston engine ever devised- a single piston powered by a tiny alcohol lamp. Glass components allow a view of the internal workings of this design, and the interesting startup behavior from oscillation to full rotation. Heat engines produce mechanical motion from a difference in temperature- here the piston side is near room temperature (the central aluminum post is an excellent conductor and acts as a heat sink as the gas flows through), and the test tube is kept at high temperature via the flame, with metal fibers to help conduct the heat into the air (this component is called the regenerator). Swipe to see the elegant assembly of this model, and swipe again to see the engine power down. This external combustion design is attributed to Scottish engineer Robert Stirling back in 1816.


Kitty Cat Fireworks Lamp

Variations (bear, spaceman) avaialable from these sources: 
From Etsy: BUY NOW Fireworks Infinity Lamps
From Amazon: BUY NOW Fireworks Infinity Lamps

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The Kitty Cat Lamp I found: here

Kitty Cat Fireworks Lamp: illusion of depth from multiple refections. This glass cat sculpture is partially coated inside and out with a thin metal layer. The metal layer is made thinner in a pattern of small circles and stars to produce iridescent colors through thin-film interference effects. When lit from within by white LEDs, multiple reflections on the curved contour of the glass creates the firework like spray of light and color.

 

Galton Boards: Small and Large

Available here: 
From Amazon: BUY NOW: Desk Galton Board 
From Amazon: BUY NOW: Display Galton Board (comes with an wonderful fact filled booklet). 

Note: this site contains affiliate links for which I may be compensated

Galton Boards Large & Small: 6000 steel balls vs. 3000 in the compact version. Each ball has a 50/50 chance of going left or right at each branch such that the balls are distributed at the bottom by the mathematical binomial distribution (12 layers for the desk version, 14 layers for the deluxe). In addition the number of balls in each bin can be predicted by Pascal’s triangle, where the number on each hexagonal branch point represents the number of possible paths to reach that point from the top. Two extraordinary designs by Philip Poissant and the best version of the Galton Board since its invention by Sir Francis Galton(1894). An amazing demonstration of the Central Limit Theorem for the home or classroom! 

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Magic Portal Illusion Redux

Get one, expertly printed and assembled, here:

From Etsy: BUY NOW: Magic Portal Illusion Desk Toy

Or print it yourself: 3D Print Files: Magic Portal Desk Toy

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Magic Portal Illusion Redux: another look at this new illusion I’ve been obsessed with where it appears as though these colorful strands are passing in and out of a 4th dimension- the illusion seems even stronger when operated along the horizontal. The mechanical principle employed is similar to that of a lead screw and slider type actuator, except here translating the slider back and forth rotates the helical strands at just the right rate to produce the illusion. An amazing 3D print creation of Ada Cohen, expertly printed and assembled by Alex L. Kling.

Magnetic Top and Curious Forms

This top and moving cutout set will be part of the very next Curiosity Box:
Get (or give!) a Curiosity Box subscription here: JOIN NOW: The Curiosity Box

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Magnetic Top & Curious Forms: this fantastic physics toy will be coming in the very next @thecuriositybox (Order today!)— The magnetized tip of the spin top connects to a smooth metal cutout, but since the top is much more massive, the metal cutout moves creating the curious motion. This kinetic art toy takes advantage of Newton’s 3rd law and rotational kinetic energy. The Vsauce team has created this amazing version of the classic “top & snake” physics toy from the 1950s- and the supplied cutouts include a spiral, an abstract form with triangular symmetry, and a snake! 

Galton Board with Pascal's Triangle

Get this amazing Galton Board probabutly demonstrator here: 

From Amazon: BUY NOW: Galton Board (comes with an wonderful fact filled booklet). 

Note: this site contains affiliate links for which I may be compensated

Galton Board with Pascal’s Triangle: 6000 steel balls (and one gold bead) fall through 14 levels of branching paths and always end up matching a bell curve distribution. Each ball has a 50/50 chance of going left or right at each branch such that the balls are distributed at the bottom by the mathematical binomial distribution. In addition the number of balls in each bin can be predicted by Pascal’s triangle, where the number on each hexagonal branch point represents the number of possible paths to reach that point from the top. See if your eyes can follow the path of the gold bead (representing a single random path) in the 240fps slow motion segment of the video. This extraordinary design by Philip Poissant is a modern version of the Galton Board, invented by Sir Francis Galton(1894) to demonstrate the Central Limit Theorem and show how random processes gather around the mean. Made and distributed by Four Pines Publishing Inc. and IFA.com 


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Nautilus Spiral Gears

Get this inexpensive 3D printed set here:

From Etsy: BUY NOW: Nautilus Gear Set

Note: this site contains affiliate links for which I may be compensated

Nautilus Spiral Gears: an extreme example of non-circular gear sets. This set is based on the famous Fibonacci spiral and evokes the cross section of nautilus shell with internal chambers. If one gear of this set is turned at constant speed, the other will turn with an varying speed. A 3D print of Misha Tikh and the research of Balint et al. 

Anamorphic Locomotion Cup & Saucer

Animated Horse set available here:
From Amazon: BUY NOW: Luycho Locomotion Horse Cup & Saucer 

Note: this site contains affiliate links for which I may be compensated

CAUTION: There are poorly made counterfeit versions on Amazon as well. Only these origial Luycho products produce a clean animation and image.  

Locomotion Anamorphic Cup & Saucer: an amazing combination of barrier grid animation and anamorphic projection rendered on elegant porcelain. The warped image on the saucer is reconstructed by reflection off the surface of the cup, however the gold mirroring is comprised of parallel lines that only reflect part of the image pattern. Turing the cup (or the saucer and cup together) reveals a flying bird or running horse! Another expertly crafted product from Luycho. 


Magnetic Flux Gyro

Magnetic Flux Gyroscope art and other amazing science inspired jewelry available here:

From Foxtail Jewelry: BUY NOW: Kinetic Magnetic Pendants

From Foxtail Jewelry: BUY NOW: Tabletop Magnetic Kinetic Art

Note: this site contains affiliate links for which I may be compensated

Magnetic Flux Gyroscope: kinetic art on a stand (or on a chain)- physics you can wear, rendered in brass or silver by @foxtailjewelry in collaboration with @physicsfun! Two half-sphere neodymium magnets on chains remain suspended under centripetal acceleration - connected by the invisible but tactile force of magnetic fields. Honored to have this concept featured in the gallery of @foxtailjewelry.

The PhoTOP

Get a PhoTOP from these fine vendors (comes with laser pointer!):

From Educational Innovations: BUY NOW PhoTOP 

Another amazing spinning device by Prof. Ken Brecher! Get his other spinning tops here:
From Etsy: BUY NOW: PhiTOP, PiTOP, eTOP, iTOP, DeltaCELT

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The PhoTOP: phosphorescent glow illuminates the intricate path of a 405nm laser pointer beam on a balanced spinning disk. Let the disk set alone for a few minutes to allow the traces to fade- and repeat again and again to experiment making new patterns.

Magnetic Flux Gyroscope Pendant: V2

Magnetic Flux Pendants and other amazing science inspired fine jewelry available here:

From Foxtail Jewelry: BUY NOW: Kinetic Magnetic Pendants

Note: this site contains affiliate links for which I may be compensated

Magnetic Flux Gyroscope Pendant: version 2 of the @foxtailjewelry - @physicsfun collab! Two half-sphere neodymium magnets on chains remain suspended under centripetal acceleration. Another kinetic art necklace design by artist Betsy Yates of @foxtailjewelry who brings this concept to life so elegantly and is currently featuring @physicsfun inspired pendants in her gallery and store.


Photochromic Frisbee

Get this quality flying disk here:

From Amazon: BUY NOW: UV Chameleon by Discraft

You may also want a powerful UV flashlight:
From Amazon: BUY NOW: High Power UV Light

Note: this site contains affiliate links for which I may be compensated

Photochromic Frisbee: the plastic of the UV Chameleon by Discraft contains photochromic pigment molecules that actually change shape when struck by photons of UV light, and the new shape alters their absorption properties such that they reflect a deep purple color. The color is temporary- room temperature thermal energy bumps the molecules back into their original configuration, and the color fades back to white in about 3 minutes (shown here sped up x7). A long wave UV flashlight is used to “paint” the disk purple, and sunlight will do the same very quickly.

Missing Edge Piece Puzzle

Get this puzzle here:

From Etsy: BUY NOW: Missing Edge Puzzle Card

See the simiar and amazing: Matsuyama's Puzzle

Note: this site contains affiliate links for which I may be compensated

Missing Edge Piece Puzzle: fun math involved in the design of this puzzle, which illustrates how the concept of area can challenge our intuitions. Swipe to see the similar and amazing Matsuyama’s Paradox puzzle. A precision crafted puzzle by Jeux Efcé game shop. 

Butterfly Mendocino Motor

Get this affordable motor here: 

From engineDIY: BUY NOW Solar Levitating Motor

Note: this site contains affiliate links for which I may be compensated

Butterfly Mendocino Motor: an elegant version of this motor with only two photovoltaic cells mounted with care to ensure precision balance. This motor will spin quietly to high RPMs on any sunlit windowsill. In this model each of the two photovoltaic solar cells is connected to a coil of copper wire under the opposing solar cell. When the rotor is lit from above the top solar cell provides electric current to the coil in the bottom position which becomes a temporary electromagnet that pushes against the two mounted rectangular permanent magnets propelling the rotor to rotate. As the rotor turns, the coil that moves into the bottom position is likewise energized by the solar cell currently at the top- one can say the light commutates this motor. 2D magnetic levitation is provided by permanent magnets where an acrylic plate constrains the third dimension, and makes for a nice bearing surface for minimal friction. Invented in the 1960s by Daryl Chapin of Bell Labs and popularized by Larry Springs of Mendocino CA